straw man vs simulacrum

straw man and simulacrum both are nouns.

Word	Noun	Adjective	Verb	Adverb
straw man	Yes	No	No	No
simulacrum	Yes	No	No	No

As nouns, simulacrum is a hypernym of straw man; that is, simulacrum is a word with a broader meaning than straw man:

straw man: an effigy in the shape of a man to frighten birds away from seeds
simulacrum: a representation of a person (especially in the form of sculpture)

Other hypernyms of straw man include effigy, image.

straw man (noun)	simulacrum (noun)
an effigy in the shape of a man to frighten birds away from seeds	a representation of a person (especially in the form of sculpture)
a weak or sham argument set up to be easily refuted	an insubstantial or vague semblance
a person used as a cover for some questionable activity