quill vs flight feather

quill and flight feather both are nouns.

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

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

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

Other synonyms of quill include pinion, quill feather.

quill (noun)	flight feather (noun)
a stiff hollow protective spine on a porcupine or hedgehog	any of the larger wing or tail feathers of a bird
the hollow spine of a feather
any of the larger wing or tail feathers of a bird
pen made from a bird's feather