Cancer vs arthropod genus

Cancer and arthropod genus both are nouns.

Word	Noun	Adjective	Verb	Adverb
Cancer	Yes	No	No	No
arthropod genus	Yes	No	No	No

As nouns, arthropod genus is a hypernym of Cancer; that is, arthropod genus is a word with a broader meaning than Cancer:

Cancer (noun)	arthropod genus (noun)
type genus of the family Cancridae	a genus of arthropods
the fourth sign of the zodiac; the sun is in this sign from about June 21 to July 22
a small zodiacal constellation in the Northern Hemisphere; between Leo and Gemini
(astrology) a person who is born while the sun is in Cancer