mud puppy vs salamander

mud puppy and salamander both are nouns.

Word	Noun	Adjective	Verb	Adverb
mud puppy	Yes	No	No	No
salamander	Yes	No	No	No

As nouns, salamander is a hypernym of mud puppy; that is, salamander is a word with a broader meaning than mud puppy:

mud puppy: aquatic North American salamander with red feathery external gills
salamander: any of various typically terrestrial amphibians that resemble lizards and that return to water only to breed

As nouns, salamander is a hypernym of mud puppy; that is, salamander is a word with a broader meaning than mud puppy:

mud puppy: large salamander of North American rivers and streams
salamander: any of various typically terrestrial amphibians that resemble lizards and that return to water only to breed

mud puppy (noun)	salamander (noun)
aquatic North American salamander with red feathery external gills	any of various typically terrestrial amphibians that resemble lizards and that return to water only to breed
larval salamander of mountain lakes of Mexico that usually lives without metamorphosing	fire iron consisting of a metal rod with a handle; used to stir a fire
large salamander of North American rivers and streams	reptilian creature supposed to live in fire