C vs degree

C and degree both are nouns.

Word	Noun	Adjective	Verb	Adverb
C	Yes	No	No	No
degree	Yes	No	No	No

As nouns, degree is a hypernym of C; that is, degree is a word with a broader meaning than C:

C (noun)	degree (noun)
street names for cocaine	a position on a scale of intensity or amount or quality
the 3rd letter of the Roman alphabet	the seriousness of something (e.g., a burn or crime)
a general-purpose programing language closely associated with the UNIX operating system	the highest power of a term or variable
(music) the keynote of the scale of C major	an award conferred by a college or university signifying that the recipient has satisfactorily completed a course of study
a unit of electrical charge equal to the amount of charge transferred by a current of 1 ampere in 1 second	a measure for arcs and angles
ten 10s	a unit of temperature on a specified scale
a degree on the centigrade scale of temperature	a specific identifiable position in a continuum or series or especially in a process
an abundant nonmetallic tetravalent element occurring in three allotropic forms: amorphous carbon and graphite and diamond; occurs in all organic compounds
one of the four nucleotides used in building DNA, also known as also known as deoxycytidylate, or dCMP; all four nucleotides have a common phosphate group and a sugar (ribose)
a base found in DNA and RNA and derived from pyrimidine; pairs with guanine
a vitamin found in fresh fruits (especially citrus fruits) and vegetables; prevents scurvy