Cancer vs Cancer the Crab

Cancer and Cancer the Crab both are nouns.

Word	Noun	Adjective	Verb	Adverb
Cancer	Yes	No	No	No
Cancer the Crab	Yes	No	No	No

As nouns, Cancer and Cancer the Crab are synonyms defined as:

Cancer and Cancer the Crab: the fourth sign of the zodiac; the sun is in this sign from about June 21 to July 22

Other synonyms of Cancer include Crab.

Cancer (noun)	Cancer the Crab (noun)
type genus of the family Cancridae	the fourth sign of the zodiac; the sun is in this sign from about June 21 to July 22
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