rim vs felly

rim and felly both are nouns.

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

As nouns, felly is a hyponym of rim; that is, felly is a word with a more specific, narrower meaning than rim:

Other hyponyms of rim include felloe.

rim (noun)	felly (noun)
the top edge of a vessel or other container	rim (or part of the rim) into which spokes are inserted
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