straw man vs bird-scarer

straw man and bird-scarer both are nouns.

Word	Noun	Adjective	Verb	Adverb
straw man	Yes	No	No	No
bird-scarer	Yes	No	No	No

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

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

Other synonyms of straw man include scarecrow, scarer, strawman.

straw man (noun)	bird-scarer (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
a weak or sham argument set up to be easily refuted
a person used as a cover for some questionable activity