arrowworm vs chaetognath

arrowworm and chaetognath both are nouns.

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

As nouns, arrowworm and chaetognath are synonyms defined as:

arrowworm and chaetognath: 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

arrowworm (noun)	chaetognath (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