As adjectives the difference between musky and muggy
is that musky is having the scent of musk while muggy is humid, or hot and humid.
As a noun musky
is muskellunge .
musky
English
Etymology 1
From
Adjective
(er)
having the scent of musk
Etymology 2
Shortening of muskellunge .
Noun
(muskies)
muskellunge
muggy
English
Adjective
(er)
humid, or hot and humid.
Synonyms
* (of the weather) , oppressive, sultry