flight feather vs pinion

flight feather and pinion both are nouns.

Word	Noun	Adjective	Verb	Adverb
flight feather	Yes	No	No	No
pinion	Yes	No	Yes	No

As nouns, flight feather and pinion are synonyms defined as:

flight feather and pinion: any of the larger wing or tail feathers of a bird

Other synonyms of flight feather include quill, quill feather.

flight feather (noun)	pinion (noun)
any of the larger wing or tail feathers of a bird	wing of a bird
	any of the larger wing or tail feathers of a bird
	a gear with a small number of teeth designed to mesh with a larger wheel or rack

flight feather (verb)	pinion (verb)
	cut the wings off (of birds)
	bind the arms of