whirlybird vs chopper

whirlybird and chopper both are nouns.

Word	Noun	Adjective	Verb	Adverb
whirlybird	Yes	No	No	No
chopper	Yes	No	No	No

As nouns, whirlybird and chopper are synonyms defined as:

whirlybird and chopper: an aircraft without wings that obtains its lift from the rotation of overhead blades

Other synonyms of whirlybird include eggbeater, helicopter.

whirlybird (noun)	chopper (noun)
an aircraft without wings that obtains its lift from the rotation of overhead blades	a grounder that bounces high in the air
	a butcher's knife having a large square blade
	an aircraft without wings that obtains its lift from the rotation of overhead blades
	informal terms for a human `tooth'