red worm vs nightwalker

red worm and nightwalker both are nouns.

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

As nouns, red worm and nightwalker are synonyms defined as:

red worm and nightwalker: terrestrial worm that burrows into and helps aerate soil; often surfaces when the ground is cool or wet; used as bait by anglers

Other synonyms of red worm include angleworm, crawler, dew worm, earthworm, fishing worm, fishworm, nightcrawler, wiggler.

red worm (noun)	nightwalker (noun)
terrestrial worm that burrows into and helps aerate soil; often surfaces when the ground is cool or wet; used as bait by anglers	terrestrial worm that burrows into and helps aerate soil; often surfaces when the ground is cool or wet; used as bait by anglers