bird-scarer vs scarecrow

bird-scarer and scarecrow both are nouns.

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

As nouns, bird-scarer and scarecrow are synonyms defined as:

bird-scarer and scarecrow: an effigy in the shape of a man to frighten birds away from seeds

Other synonyms of bird-scarer include scarer, straw man, strawman.

bird-scarer (noun)	scarecrow (noun)
an effigy in the shape of a man to frighten birds away from seeds	an effigy in the shape of a man to frighten birds away from seeds