method acting vs playacting

method acting and playacting both are nouns.

Word	Noun	Adjective	Verb	Adverb
method acting	Yes	No	No	No
playacting	Yes	No	No	No

As nouns, playacting is a hypernym of method acting; that is, playacting is a word with a broader meaning than method acting:

method acting: an acting technique introduced by Stanislavsky in which the actor recalls emotions or reactions from his or her own life and uses them to identify with the character being portrayed
playacting: the performance of a part or role in a drama

Other hypernyms of method acting include acting, performing, playing.

method acting (noun)	playacting (noun)
an acting technique introduced by Stanislavsky in which the actor recalls emotions or reactions from his or her own life and uses them to identify with the character being portrayed	the performance of a part or role in a drama