hilus vs fissure

hilus and fissure both are nouns.

Word	Noun	Adjective	Verb	Adverb
hilus	Yes	No	No	No
fissure	Yes	No	Yes	No

As nouns, fissure is a hypernym of hilus; that is, fissure is a word with a broader meaning than hilus:

hilus: (anatomy) a depression or fissure where vessels or nerves or ducts enter a bodily organ
fissure: (anatomy) a long narrow slit or groove that divides an organ into lobes

hilus (noun)	fissure (noun)
(anatomy) a depression or fissure where vessels or nerves or ducts enter a bodily organ	(anatomy) a long narrow slit or groove that divides an organ into lobes
	a long narrow cleft
	a long narrow depression in a surface

hilus (verb)	fissure (verb)
	break into fissures or fine cracks