We don't have synonyms for cresc yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are crest, cress and cres..
(n) :
(music) Abbreviation of crescendo. [(music) An instruction to play gradually more loudly, denoted by a long, narrow angle with its apex on the left ( < ), by musicians called a hairpin.]
(n) :
(music) Abbreviation of crescendo. [(music) An instruction to play gradually more loudly, denoted by a long, narrow angle with its apex on the left ( < ), by musicians called a hairpin.]