mug vs stare

mug and stare both are nouns.

Word	Noun	Adjective	Verb	Adverb
mug	Yes	No	Yes	No
stare	Yes	No	Yes	No

As verbs, stare is a hypernym of mug; that is, stare is a word with a broader meaning than mug:

Other hypernyms of mug include gaze.

mug (noun)	stare (noun)
with handle and usually cylindrical	a fixed look with eyes open wide
the human face (`kisser' and `smiler' and `mug' are informal terms for `face' and `phiz' is British)
a person who is gullible and easy to take advantage of
the quantity that can be held in a mug

mug (verb)	stare (verb)
To stare awkwardly	fixate one's eyes
rob at gunpoint or with the threat of violence	look at with fixed eyes