felly vs rim

felly and rim both are nouns.

Word	Noun	Adjective	Verb	Adverb
felly	Yes	No	No	No
rim	Yes	No	Yes	No

As nouns, rim is a hypernym of felly; that is, rim is a word with a broader meaning than felly:

felly (noun)	rim (noun)
rim (or part of the rim) into which spokes are inserted	the top edge of a vessel or other container
	a projection used for strength or for attaching to another object
	the outer part of a wheel to which the tire is attached
	(basketball) the hoop from which the net is suspended
	the shape of a raised edge of a more or less circular object