passer vs walker

passer and walker both are nouns.

Word	Noun	Adjective	Verb	Adverb
passer	Yes	No	No	No
walker	Yes	No	No	No

As nouns, walker is a hypernym of passer; that is, walker is a word with a broader meaning than passer:

Other hypernyms of passer include footer, pedestrian.

passer (noun)	walker (noun)
(football) a ball carrier who tries to gain ground by throwing a forward pass	an enclosing framework on casters or wheels; helps babies learn to walk
a person who passes by casually or by chance	a light enclosing framework (trade name Zimmer) with rubber castors or wheels and handles; helps invalids or the handicapped or the aged to walk
a student who passes an examination	a shoe designed for comfortable walking
a person who passes as a member of a different ethnic or racial group	a person who travels by foot