solenogaster vs aplacophoran

solenogaster and aplacophoran both are nouns.

Word	Noun	Adjective	Verb	Adverb
solenogaster	Yes	No	No	No
aplacophoran	Yes	No	No	No

As nouns, solenogaster and aplacophoran are synonyms defined as:

solenogaster and aplacophoran: deep-water wormlike mollusks lacking calcareous plates on the body but having fine slimy spicules on the covering mantle

solenogaster (noun)	aplacophoran (noun)
deep-water wormlike mollusks lacking calcareous plates on the body but having fine slimy spicules on the covering mantle	deep-water wormlike mollusks lacking calcareous plates on the body but having fine slimy spicules on the covering mantle