THESAURUS
antonym, articulation, expression, free form, homograph, homonym, homophone, lexeme, linguistic form, locution, logos, metonym, minimum free form, polysyllable, syllable, synonym, term, usage, utterance, verbalism, verbum, vocable, word
ROGET THESAURUS
Letter
N
letter, character, hieroglyphic, type, capitals, digraph, trigraph, ideogram, ideograph, majuscule, minuscule, majuscule, minuscule, alphabet, ABC, abecedary, christcross-row, consonant, vowel, diphthong, triphthong, mute, liquid, labial, dental, guttural, syllable,
monosyllable, dissyllable, polysyllable, affix, suffix, spelling, orthograph, phonography, phonetic spelling, anagrammatism, metagrammatism, cipher, monogram, anagram, doubleacrostic, literal, alphabetical, abecedarian, syllabic, majuscular, minuscular, uncial.