hag vs eptatretus

hag and eptatretus both are nouns.

Word	Noun	Adjective	Verb	Adverb
hag	Yes	No	No	No
eptatretus	Yes	No	No	No

As nouns, eptatretus is a hyponym of hag; that is, eptatretus is a word with a more specific, narrower meaning than hag:

hag: eellike cyclostome having a tongue with horny teeth in a round mouth surrounded by eight tentacles; feeds on dead or trapped fishes by boring into their bodies
eptatretus: a fossil hagfish of the genus Eptatretus

Other hyponyms of hag include Myxine glutinosa, Myxinikela siroka.

hag (noun)	eptatretus (noun)
eellike cyclostome having a tongue with horny teeth in a round mouth surrounded by eight tentacles; feeds on dead or trapped fishes by boring into their bodies	a fossil hagfish of the genus Eptatretus
an ugly evil-looking old woman