silvertip vs brown bear

silvertip and brown bear both are nouns.

Word	Noun	Adjective	Verb	Adverb
silvertip	Yes	No	No	No
brown bear	Yes	No	No	No

As nouns, brown bear is a hypernym of silvertip; that is, brown bear is a word with a broader meaning than silvertip:

silvertip: powerful brownish-yellow bear of the uplands of western North America
brown bear: large ferocious bear of Eurasia

Other hypernyms of silvertip include bruin, Ursus arctos.

silvertip (noun)	brown bear (noun)
powerful brownish-yellow bear of the uplands of western North America	large ferocious bear of Eurasia