Thematic index of Grammatical affixes
| -a1 | Forming singular words of various types. |
| -a2 | The plural of certain nouns of Latin or Greek origin. |
| -ac | Forming adjectives and nouns. |
| -aceous | Forming adjectives. |
| -ae | Forming plurals. |
| -age | Forming nouns. |
| -al1 | Forming adjectives and some nouns. |
| -ane2 | Forming adjectives. |
| -ant | Forming adjectives and nouns. |
| -ar1 | Forming adjectives. |
| -ar2 | Forming nouns. |
| -ard | Forming nouns. |
| -arian | Forming adjectives and corresponding nouns. |
| -ary1 | Forming nouns. |
| -ary2 | Forming adjectives. |
| -ate1 | Forming nouns. |
| -ate2 | Forming adjectives. |
| -ate3 | Forming verbs. |
| -atic | Forming adjectives, and some nouns. |
| be- | Forming verbs and adjectives. |
| -cule | Forming nouns. |
| de- | Forming verbs and their derivatives. |
| -dom | Forming abstract or collective nouns. |
| -ean | Forming adjectives and some nouns. |
| -ee | Forming nouns from verbs. |
| -eer | Forming nouns and verbs. |
| -ellum | Forming nouns. |
| -en1 | Forming verbs from nouns and adjectives. |
| en-1 | Forming verbs. |
| -en2 | Forming adjectives from nouns. |
| -en3 | Forming past participles of strong verbs. |
| -en4 | Forming noun plurals. |
| -end | Forming nouns. |
| -er1 | Forming nouns. |
| -er2 | Forming the comparative of some adjectives and adverbs. |
| -er4 | Forming verbs. |
| -ery | Forming nouns. |
| -esce | Forming verbs, often denoting the initiation of an action. |
| -ese | Forming adjectives and nouns. |
| -est1 | Forming the superlatives of some adjectives and adverbs. |
| -est2 | Forming the second person singular of verbs. |
| -et | Forming nouns, originally diminutives. |
| -eth2 | Forming the third person singular of the present tense of verbs. |
| -etic | Forming adjectives and some nouns. |
| -faction | Nouns of action or associated state. |
| -fic | Forming adjectives of action. |
| -fication | Nouns of action. |
| for- | Forming verbs and adjectives. |
| -i- | A connecting vowel. |
| -i1 | Forming plurals. |
| -i2 | Adjectives and nouns relating to countries. |
| -ia | Forming nouns. |
| -ian | Forming adjectives and nouns. |
| -ic | Forming adjectives and some nouns. |
| -ice | Forming nouns. |
| -id1 | Forming adjectives. |
| -id2 | Forming nouns. |
| -ile | Forming adjectives and some nouns. |
| -im | A plural ending of words from Hebrew. |
| -ine1 | Forming adjectives. |
| -ine3 | Forming nouns. |
| -ing1 | Forming nouns derived from verbs. |
| -ing2 | Forming the present participle of verbs, and adjectives from nouns. |
| -ing3 | Forming nouns. |
| -ion | Forming nouns denoting verbal action. |
| -ior | Forming adjectives of comparison. |
| -ise2 | Forming nouns. |
| -ish1 | Forming adjectives. |
| -ish2 | Forming verbs. |
| -ism | Forming nouns. |
| -ison | Forming nouns. |
| -ist | Forming personal nouns and some related adjectives. |
| -ite1 | Forming nouns. |
| -ite2 | Forming adjectives, nouns, and verbs. |
| -itic | Forming adjectives and nouns. |
| -ition | Forming nouns. |
| -itious | Forming adjectives. |
| -itive | Forming adjectives. |
| -ize | Forming verbs. |
| -le1 | Forming nouns. |
| -le3 | Forming verbs. |
| -ly | Forming adjectives and adverbs. |
| -ment | Forming nouns. |
| -mony | Forming nouns. |
| -most | Superlative adjectives and adverbs. |
| -o- | A linking vowel. |
| -ock | Forming nouns. |
| -ole2 | Forming nouns. |
| -oon | Forming nouns and derived verbs. |
| -or2 | Forming nouns denoting an abstract state or condition. |
| -osity | Forming nouns. |
| -otic | Forming adjectives and nouns. |
| -our | Forming nouns. |
| -ous | Forming adjectives. |
| -rel | Forming nouns. |
| -s' | Plural possessive nouns. |
| -s1 | Noun plurals. |
| -'s1 | Possessive forms of nouns. |
| -s2 | Third person singular of the present tense of verbs. |
| -'s2 | Various contractions. |
| -ship | Forming abstract nouns. |
| -some1 | Forming adjectives. |
| -sy | Forming nouns and adjectives. |
| -th2 | Forming nouns. |
| -tropy | Forming nouns that correspond to adjectives in -tropic. |
| -tude | Forming abstract nouns. |
| -ty1 | Forming nouns. |
| -ula | Forming diminutive nouns. |
| -ule | Forming nouns. |
| -uncle | Forming nouns, chiefly diminutives. |
| -ure1 | Forming nouns. |
| -ure2 | Forming nouns. |
| -ution | Forming nouns. |
| -x | Forming the plural of many nouns ending in -u taken from French. |
| y- | An archaic form marking the past participle. |
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