oligochaete vs red worm

oligochaete and red worm both are nouns.

Word	Noun	Adjective	Verb	Adverb
oligochaete	Yes	No	No	No
red worm	Yes	No	No	No

As nouns, red worm is a hyponym of oligochaete; that is, red worm is a word with a more specific, narrower meaning than oligochaete:

oligochaete: hermaphroditic terrestrial and aquatic annelids having bristles borne singly along the length of the body
red worm: terrestrial worm that burrows into and helps aerate soil; often surfaces when the ground is cool or wet; used as bait by anglers

oligochaete (noun)	red worm (noun)
hermaphroditic terrestrial and aquatic annelids having bristles borne singly along the length of the body	terrestrial worm that burrows into and helps aerate soil; often surfaces when the ground is cool or wet; used as bait by anglers