browser vs looker

browser and looker both are nouns.

Word	Noun	Adjective	Verb	Adverb
browser	Yes	No	No	No
looker	Yes	No	No	No

As nouns, looker is a hypernym of browser; that is, looker is a word with a broader meaning than browser:

browser: a viewer who looks around casually without seeking anything in particular
looker: a close observer; someone who looks at something (such as an exhibition of some kind)

Other hypernyms of browser include spectator, viewer, watcher, witness.

browser (noun)	looker (noun)
a program used to view HTML documents	a very attractive or seductive looking woman
a viewer who looks around casually without seeking anything in particular	a close observer; someone who looks at something (such as an exhibition of some kind)