Salvelinus fontinalis vs trout

Salvelinus fontinalis and trout both are nouns.

Word	Noun	Adjective	Verb	Adverb
Salvelinus fontinalis	Yes	No	No	No
trout	Yes	No	No	No

As nouns, trout is a hypernym of Salvelinus fontinalis; that is, trout is a word with a broader meaning than Salvelinus fontinalis:

Salvelinus fontinalis: North American freshwater trout; introduced in Europe
trout: any of various game and food fishes of cool fresh waters mostly smaller than typical salmons

Salvelinus fontinalis (noun)	trout (noun)
North American freshwater trout; introduced in Europe	any of various game and food fishes of cool fresh waters mostly smaller than typical salmons
	flesh of any of several primarily freshwater game and food fishes