THESAURUS
antonym, articulation, expression, free form, grandiloquence, hard word, homograph, homonym, homophone, jawbreaker, lexeme, lexiphanicism, linguistic form, locution, logos, long word, metonym, minimum free form, monosyllable, sesquipedalian, 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.