We don't have synonyms for pinch-hits yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are pinch hit, pinch-hit and pinch hits.
(v) :
(intransitive, idiomatic) To do something in the place of another person who is not able to perform or is less skilled; to substitute or stand in for somebody.
(v) :
(intransitive, baseball) To bat in place of another player
(v) :
(intransitive, idiomatic) To do something in the place of another person who is not able to perform or is less skilled; to substitute or stand in for somebody.
(v) :
(intransitive, baseball) To bat in place of another player