pinion vs flight feather

pinion and flight feather both are nouns.

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

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

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

Other synonyms of pinion include quill, quill feather.

pinion (noun)	flight feather (noun)
wing of a bird	any of the larger wing or tail feathers 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

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