hex vs hexadecimal

hex is a noun but hexadecimal is not a noun.

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

As adjectives, hex and hexadecimal are synonyms defined as:

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

hex (noun)	hexadecimal (noun)
an evil spell

hex (adjective)	hexadecimal (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

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