sea lily vs crinoid

sea lily and crinoid both are nouns.

Word	Noun	Adjective	Verb	Adverb
sea lily	Yes	No	No	No
crinoid	Yes	Yes	No	No

As nouns, crinoid is a hypernym of sea lily; that is, crinoid is a word with a broader meaning than sea lily:

sea lily: crinoid with delicate radiating arms and a stalked body attached to a hard surface
crinoid: primitive echinoderms having five or more feathery arms radiating from a central disk

sea lily (noun)	crinoid (noun)
crinoid with delicate radiating arms and a stalked body attached to a hard surface	primitive echinoderms having five or more feathery arms radiating from a central disk

sea lily (adjective)	crinoid (adjective)
	of or relating to or belonging to the class Crinoidea