playact vs overact

playact and overact both are verbs.

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

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

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

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