mud turtle vs stinkpot

mud turtle and stinkpot both are nouns.

Word	Noun	Adjective	Verb	Adverb
mud turtle	Yes	No	No	No
stinkpot	Yes	No	No	No

As nouns, stinkpot is a hyponym of mud turtle; that is, stinkpot is a word with a more specific, narrower meaning than mud turtle:

mud turtle: bottom-dwelling freshwater turtle inhabiting muddy rivers of North America and Central America
stinkpot: small freshwater turtle having a strong musky odor

Other hyponyms of mud turtle include musk turtle.

mud turtle (noun)	stinkpot (noun)
bottom-dwelling freshwater turtle inhabiting muddy rivers of North America and Central America	small freshwater turtle having a strong musky odor
	a person who is deemed to be despicable or contemptible