alphanumerical vs alphanumeric

alphanumerical and alphanumeric both are adjectives.

Word	Noun	Adjective	Verb	Adverb
alphanumerical	No	Yes	No	No
alphanumeric	No	Yes	No	No

As adjectives, alphanumerical and alphanumeric are synonyms defined as:

alphanumerical and alphanumeric: of or pertaining to alphanumeric characters

Other synonyms of alphanumerical include alphameric, alphamerical.

alphanumerical (adjective)	alphanumeric (adjective)
of or pertaining to alphanumeric characters	of or pertaining to alphanumeric characters