hexadecimal vs hex

hexadecimal is not a noun while hex is a noun.

Word	Noun	Adjective	Verb	Adverb
hexadecimal	No	Yes	No	No
hex	Yes	Yes	Yes	No

As adjectives, hexadecimal and hex are synonyms defined as:

hexadecimal and hex: of or pertaining to a number system having 16 as its base

hexadecimal (noun)	hex (noun)
	an evil spell

hexadecimal (adjective)	hex (adjective)
of or pertaining to a number system having 16 as its base	of or pertaining to a number system having 16 as its base

hexadecimal (verb)	hex (verb)
	cast a spell over someone or something; put a hex on someone or something