holothurian vs trepang

holothurian and trepang both are nouns.

Word	Noun	Adjective	Verb	Adverb
holothurian	Yes	No	No	No
trepang	Yes	No	No	No

As nouns, trepang is a hyponym of holothurian; that is, trepang is a word with a more specific, narrower meaning than holothurian:

holothurian: echinoderm having a flexible sausage-shaped body, tentacles surrounding the mouth and tube feet; free-living mud feeders
trepang: of warm coasts from Australia to Asia; used as food especially by Chinese

Other hyponyms of holothurian include Holothuria edulis.

holothurian (noun)	trepang (noun)
echinoderm having a flexible sausage-shaped body, tentacles surrounding the mouth and tube feet; free-living mud feeders	of warm coasts from Australia to Asia; used as food especially by Chinese