playact vs overplay

playact and overplay both are verbs.

Word	Noun	Adjective	Verb	Adverb
playact	No	No	Yes	No
overplay	No	No	Yes	No

As verbs, overplay is a hyponym of playact; that is, overplay is a word with a more specific, narrower meaning than playact:

Other hyponyms of playact include stooge, mime, pantomime, ham, ham it up, overact, underact, underplay.

playact (verb)	overplay (verb)
perform on a stage or theater	exaggerate one's acting