chaetognath vs arrowworm

chaetognath and arrowworm both are nouns.

Word	Noun	Adjective	Verb	Adverb
chaetognath	Yes	No	No	No
arrowworm	Yes	No	No	No

As nouns, chaetognath and arrowworm are synonyms defined as:

chaetognath and arrowworm: any worm of the Chaetognatha; transparent marine worm with horizontal lateral and caudal fins and a row of movable curved spines at each side of the mouth

chaetognath (noun)	arrowworm (noun)
any worm of the Chaetognatha; transparent marine worm with horizontal lateral and caudal fins and a row of movable curved spines at each side of the mouth	any worm of the Chaetognatha; transparent marine worm with horizontal lateral and caudal fins and a row of movable curved spines at each side of the mouth