We don't have synonyms for phraseme yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are phrase, phrases and phrased.
(n) :
(linguistics) An utterance, consisting of multiple words or morphemes, at least one of whose components is selectionally constrained or restricted by linguistic convention such that it is not freely chosen; a lexicalized multi-word expression.
(n) :
(linguistics) An utterance, consisting of multiple words or morphemes, at least one of whose components is selectionally constrained or restricted by linguistic convention such that it is not freely chosen; a lexicalized multi-word expression.