English Word Stress Rules: Suffix Patterns and Examples

English word stress is not random: word class, number of syllables and especially the word's ending predict the stressed syllable in a large share of vocabulary. A word ending in -tion is stressed right before the ending (inforMAtion). A word ending in -ee stresses the ending itself (employEE). A two-syllable noun usually stresses its first syllable (TAble), while the matching verb often stresses its second (to reCORD). Learn about a dozen of these patterns and you can make a confident guess about most new words you read, then confirm it by listening.

Stressed syllables in this guide are shown in capital letters. The reference accent is General American; British differences are noted where they are common.

What stress actually changes

A stressed syllable in English is louder, longer and higher (or more sharply changing) in pitch than the syllables around it, and its vowel is pronounced fully. Unstressed syllables are shorter, and their vowels often reduce to a neutral schwa. That second point is why stress matters so much: putting the stress on the wrong syllable changes not one feature but the vowels of the whole word.

Compare PHOtograph with phoTOGraphy. The letters are almost the same, but the o that is full in one word is reduced in the other. Our guide to the schwa sound explains that reduction in detail.

Rule 1: two-syllable nouns and adjectives lean first

Most two-syllable nouns and adjectives stress the first syllable.

Common exceptions include hoTEL, eVENT, caREER, maCHINE, deSIGN, poLICE, aDULT (in many American accents; British speakers usually say ADult), and adjectives beginning with a prefix like aLONE, aLIVE and aWAKE.

Rule 2: two-syllable verbs often lean second

Many two-syllable verbs, especially those built from a prefix plus a root, stress the second syllable: beGIN, deCIDE, forGET, reLAX, exPLAIN, preFER, adMIT, inVITE, preTEND.

This is a tendency rather than a rule. Verbs like HAPpen, OPen, ANswer, VISit, LISten, FOLlow and TRAVel stress the first syllable, usually because they are not prefix-plus-root words.

Rule 3: noun/verb pairs shift stress

A set of mostly Latin-based two-syllable words is spelled identically as noun and verb but stressed differently: first syllable for the noun (and adjective), second for the verb.

Because the unstressed syllable reduces, the vowels change too: a REkərd versus to rəKORD. Not every pair works this way. Words such as reVIEW, conTROL, rePORT, reSPECT and deSIGN keep second-syllable stress as nouns, and COMment and PROMise keep first-syllable stress as verbs. Listen before assuming a shift.

Rule 4: endings that stress the syllable right before them

This is the most powerful group. These endings are never stressed themselves, and they pull stress to the syllable immediately before them, no matter how long the word is.

The -ic family shows why this matters. eCONomy and eCONomist are stressed on the second syllable, but ecoNOMic moves the stress to the third, right before -ic, and the first vowel reduces as a result.

Rule 5: endings that push stress to the third syllable from the end

With these endings, count three syllables back from the end of the word and stress that one. Long words with these endings almost always follow the pattern.

For -ate verbs, the stress lands two syllables before -ate: com-MU-ni-cate, CON-cen-trate, DEM-on-strate, ap-PRE-ci-ate. The -ate syllable keeps a full vowel (it rhymes with late), which is why it can sound almost stressed; it carries secondary stress in many words.

Words ending in -ary and -ory usually stress the syllable two places before the ending in American English: DIC-tion-ar-y, SEC-re-tar-y, MAN-da-to-ry, CAT-e-go-ry. The ending keeps a full vowel with light secondary stress (DIC-shən-air-ee), whereas British English often squeezes it into one weak syllable (DIC-shən-ree, SEC-rə-tree).

Rule 6: endings that take the stress themselves

A small group of endings, mostly from French, carry the main stress.

Rule 7: stress-neutral suffixes change nothing

Many common endings attach without moving stress, so the base word's stress carries over:

• -ness, -less, -ful: HAPpiness, CAREless, BEAUtiful
• -ment: emPLOYment, aGREEment, deVELopment
• -er, -or: TEACHer, deVELoper, inVENtor
• -ing, -ed: deVELoping, reMEMbered
• -ly: SUDdenly, comPLETEly
• -able (usually): reLIable, COMfortable, deBATable
• Negative prefixes: unHAPpy, imPOSsible, disaGREE

A few -able words shift: many speakers say COMparable (from comPARE) and ADmirable (from adMIRE). Similar shifts appear with -ence: preFER becomes PREFerence, reFER becomes REFerence, and conFER becomes CONference.

Rule 8: compounds and phrasal verbs

Compound nouns usually stress the first part, while ordinary adjective plus noun phrases stress the noun. The difference can change meaning:

Phrasal verbs work the other way. The verb form stresses the particle, and a noun made from it stresses the first part:

• to set UP the room, but the SETup
• to break DOWN, but a BREAKdown
• to take OFF (a plane), but the TAKEoff
• to work OUT, but a WORKout
• to log IN, but your LOGin

Rule 9: -teen versus -ty

Numbers ending in -teen are stressed on the ending when said alone (thirTEEN, fifTEEN), and numbers in -ty on the first syllable (THIRty, FIFty). In American English the t in thirty, forty and eighty is usually a quick flap, so THIRty sounds close to THIR-dy, while the t in thirteen, fourteen and eighteen stays a clear, crisp t.

In a phrase, -teen numbers often shift stress forward to avoid two stresses in a row: "FIFteen DOLlars." To keep 15 distinct from 50 in that position, hold the long ee vowel and finish with a clear n; fifty ends in a short, light ee with no n.

Words where the rules mislead

These are frequent words where spelling or a related word suggests the wrong stress:

Dozens more everyday traps are collected in commonly mispronounced English words.

How to practice word stress

Clap or tap the pattern. Before saying a new word, tap it out: da-DA-da for baNAna, DA-da-da for CAMera. A physical beat keeps the stressed syllable in place when you speak faster.

Sort words by ending. Take ten words you learned this week and group them by suffix. Say each group aloud together: eduCAtion, inforMAtion, reVIsion. Hearing the shared rhythm fixes the pattern better than any single word.

Build word families. Say a base word and its derivatives in a row, noticing where stress moves and where it stays: PHOtograph, phoTOGrapher, photoGRAPHic; eCONomy, eCONomist, ecoNOMic. Our map of English roots and affixes is a good source of families.

Drill noun/verb pairs in sentences. "They will reCORD a new REcord." "I obJECT to that OBject." "We need a PERmit; they won't perMIT it." The contrast is clearest when both forms appear in one sentence, and these pairs also work as stress-based minimal pairs.

Check by ear. Guess the stress from the rules, then play the audio to confirm. WordFren puts a play button and a speaking check on every word, so guess-and-confirm takes seconds for new vocabulary, including each day's word of the day.

Stress at the word level is only half the picture; sentences have their own rhythm, where content words are strong and grammar words weaken and link together. That next layer is the subject of what happens to words in fast speech.