BUD Meaning of BUD in English noun 1.Synonyms: child 1, chick, chickabiddy, juvenile, kid, moppet, ||nipper, youngling, young one, youngster 2.Synonyms: seed 2, embryo, germ, nucleus, spark Merriam Webster. Collegiate thesaurus English vocabulary. Английский энциклопедический словарь тезаурус. 2003