Salvelinus alpinus vs charr

Salvelinus alpinus and charr both are nouns.

Word	Noun	Adjective	Verb	Adverb
Salvelinus alpinus	Yes	No	No	No
charr	Yes	No	No	No

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

Salvelinus alpinus: small trout of northern waters; landlocked populations in Quebec and northern New England
charr: any of several small trout-like fish of the genus Salvelinus

Other hypernyms of Salvelinus alpinus include char.

Salvelinus alpinus (noun)	charr (noun)
small trout of northern waters; landlocked populations in Quebec and northern New England	any of several small trout-like fish of the genus Salvelinus