bird-scarer vs simulacrum

bird-scarer and simulacrum both are nouns.

Word	Noun	Adjective	Verb	Adverb
bird-scarer	Yes	No	No	No
simulacrum	Yes	No	No	No

As nouns, simulacrum is a hypernym of bird-scarer; that is, simulacrum is a word with a broader meaning than bird-scarer:

bird-scarer: 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 bird-scarer include effigy, image.

bird-scarer (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)
	an insubstantial or vague semblance