Nichrome vs nickel-base alloy

Nichrome and nickel-base alloy both are nouns.

Word	Noun	Adjective	Verb	Adverb
Nichrome	Yes	No	No	No
nickel-base alloy	Yes	No	No	No

As nouns, nickel-base alloy is a hypernym of Nichrome; that is, nickel-base alloy is a word with a broader meaning than Nichrome:

Nichrome: an alloy of nickel and chromium with high electrical resistance and an ability to withstand high temperatures; used for resistance heating elements
nickel-base alloy: an alloy whose main constituent is nickel

Other hypernyms of Nichrome include nickel alloy.

Nichrome (noun)	nickel-base alloy (noun)
an alloy of nickel and chromium with high electrical resistance and an ability to withstand high temperatures; used for resistance heating elements	an alloy whose main constituent is nickel