westerner vs weeb

westerner and weeb both are nouns.

Word	Noun	Adjective	Verb	Adverb
westerner	Yes	No	No	No
weeb	Yes	No	No	No

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

westerner: an inhabitant of a western area; especially of the U.S.
weeb: A white person, who is obsessed with Japanese culture, usually pejorative

Other hyponyms of westerner include weeaboo.

westerner (noun)	weeb (noun)
an inhabitant of a western area; especially of the U.S.	A white person, who is obsessed with Japanese culture, usually pejorative