primary feather vs quill

primary feather and quill both are nouns.

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

As nouns, quill is a hypernym of primary feather; that is, quill is a word with a broader meaning than primary feather:

primary feather: one of the main flight feathers projecting along the outer edge of a bird's wing
quill: any of the larger wing or tail feathers of a bird

Other hypernyms of primary feather include flight feather, pinion, quill feather.

primary feather (noun)	quill (noun)
one of the main flight feathers projecting along the outer edge of a bird's wing	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