nonformal

used in or suitable for speech and not formal writing use of the nonformal “Dad” would be a little jarring in a prayer to our Heavenly Father Synonyms conversational, informal, colloquial, nonliterary, unbookish, unliterary, vernacular, vulgarRelated Words dialectal, dialectical (also dialectic), nonstandard, regional; incorrect, nongrammatical, substandard, uneducated, ungrammatical, unlearned; slang, slangyNear Antonyms standard, undialectical; correct, educated, genteel, grammatical, properAntonyms bookish, formal, learned, literary