THESAURUS
monosyllable
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
monosyllable
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.