Nightcrawler and Oligochaete

Nightcrawler noun - Terrestrial worm that burrows into and helps aerate soil; often surfaces when the ground is cool or wet; used as bait by anglers.

Oligochaete and nightcrawler are semantically related. In some cases you can use "Oligochaete" instead a noun "Nightcrawler".

Oligochaete noun - Hermaphroditic terrestrial and aquatic annelids having bristles borne singly along the length of the body.

Nightcrawler and oligochaete are semantically related. Sometimes you can replace term "Nightcrawler" with "Oligochaete", this nouns are similar.