beater vs eggwhisk

beater and eggwhisk both are nouns.

Word	Noun	Adjective	Verb	Adverb
beater	Yes	No	No	No
eggwhisk	Yes	No	No	No

As nouns, eggwhisk is a hyponym of beater; that is, eggwhisk is a word with a more specific, narrower meaning than beater:

Other hyponyms of beater include carpet beater, rug beater, eggbeater.

beater (noun)	eggwhisk (noun)
an implement for beating	a mixer for beating eggs or whipping cream
a worker who rouses wild game from under cover for a hunter