rinkhals vs elapid snake

rinkhals and elapid snake both are nouns.

Word	Noun	Adjective	Verb	Adverb
rinkhals	Yes	No	No	No
elapid snake	Yes	No	No	No

As nouns, elapid snake is a hypernym of rinkhals; that is, elapid snake is a word with a broader meaning than rinkhals:

rinkhals: highly venomous snake of southern Africa able to spit venom up to seven feet
elapid snake: any of numerous venomous fanged snakes of warmer parts of both hemispheres

Other hypernyms of rinkhals include elapid.

rinkhals (noun)	elapid snake (noun)
highly venomous snake of southern Africa able to spit venom up to seven feet	any of numerous venomous fanged snakes of warmer parts of both hemispheres