Elinvar vs chrome-nickel steel

Elinvar and chrome-nickel steel both are nouns.

Word	Noun	Adjective	Verb	Adverb
Elinvar	Yes	No	No	No
chrome-nickel steel	Yes	No	No	No

As nouns, Elinvar and chrome-nickel steel are synonyms defined as:

Elinvar and chrome-nickel steel: Elinvar is a trademark for a kind of steel used for watch springs because its elasticity is constant over a wide range of temperatures

Elinvar (noun)	chrome-nickel steel (noun)
Elinvar is a trademark for a kind of steel used for watch springs because its elasticity is constant over a wide range of temperatures	Elinvar is a trademark for a kind of steel used for watch springs because its elasticity is constant over a wide range of temperatures