mug vs dupe

mug and dupe both are nouns.

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

As nouns, dupe is a hypernym of mug; that is, dupe is a word with a broader meaning than mug:

Other hypernyms of mug include victim.

mug (noun)	dupe (noun)
with handle and usually cylindrical	a person who is tricked or swindled
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)	dupe (verb)
To stare awkwardly	fool or hoax
rob at gunpoint or with the threat of violence