octopus vs devilfish

octopus and devilfish both are nouns.

Word	Noun	Adjective	Verb	Adverb
octopus	Yes	No	No	No
devilfish	Yes	No	No	No

As nouns, octopus and devilfish are synonyms defined as:

octopus and devilfish: bottom-living cephalopod having a soft oval body with eight long tentacles

octopus (noun)	devilfish (noun)
bottom-living cephalopod having a soft oval body with eight long tentacles	extremely large pelagic tropical ray that feeds on plankton and small fishes; usually harmless but its size make it dangerous if harpooned
tentacles of octopus prepared as food	bottom-living cephalopod having a soft oval body with eight long tentacles
	medium-sized greyish-black whale of the northern Pacific