mnemotechnical vs mnemotechnic

mnemotechnical and mnemotechnic both are adjectives.

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

As adjectives, mnemotechnical and mnemotechnic are synonyms defined as:

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

Other synonyms of mnemotechnical include mnemonic.

mnemotechnical (adjective)	mnemotechnic (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