sea cucumber vs trepang

sea cucumber and trepang both are nouns.

Word	Noun	Adjective	Verb	Adverb
sea cucumber	Yes	No	No	No
trepang	Yes	No	No	No

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

sea cucumber: 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 sea cucumber include Holothuria edulis.

sea cucumber (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