tail feather vs pinion

tail feather and pinion both are nouns.

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

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

Other hypernyms of tail feather include flight feather, quill, quill feather.

tail feather (noun)	pinion (noun)
feather growing from the tail (uropygium) 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

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