quill feather vs quill

quill feather and quill both are nouns.

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

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

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

Other synonyms of quill feather include flight feather, pinion.

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