horned rattlesnake vs sidewinder

horned rattlesnake and sidewinder both are nouns.

Word	Noun	Adjective	Verb	Adverb
horned rattlesnake	Yes	No	No	No
sidewinder	Yes	No	No	No

As nouns, horned rattlesnake and sidewinder are synonyms defined as:

horned rattlesnake and sidewinder: small pale-colored desert rattlesnake of southwestern United States; body moves in an s-shaped curve

Other synonyms of horned rattlesnake include Crotalus cerastes.

horned rattlesnake (noun)	sidewinder (noun)
small pale-colored desert rattlesnake of southwestern United States; body moves in an s-shaped curve	small pale-colored desert rattlesnake of southwestern United States; body moves in an s-shaped curve
	air-to-air missile with infrared homing device