mnemotechnic vs mnemotechnical

mnemotechnic and mnemotechnical both are adjectives.

Word	Noun	Adjective	Verb	Adverb
mnemotechnic	No	Yes	No	No
mnemotechnical	No	Yes	No	No

As adjectives, mnemotechnic and mnemotechnical are synonyms defined as:

mnemotechnic and mnemotechnical: of or relating to or involved the practice of aiding the memory

Other synonyms of mnemotechnic include mnemonic.

mnemotechnic (adjective)	mnemotechnical (adjective)
of or relating to or involved the practice of aiding the memory	of or relating to or involved the practice of aiding the memory