scarecrow vs scarer

scarecrow and scarer both are nouns.

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

As nouns, scarecrow and scarer are synonyms defined as:

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

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

scarecrow (noun)	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