enigma canon vs enigmatical canon

enigma canon and enigmatical canon both are nouns.

Word	Noun	Adjective	Verb	Adverb
enigma canon	Yes	No	No	No
enigmatical canon	Yes	No	No	No

As nouns, enigma canon and enigmatical canon are synonyms defined as:

enigma canon and enigmatical canon: a canon in which the entrances of successive parts were indicated by cryptic symbols and devices (popular in the 15th and 16th centuries)

Other synonyms of enigma canon include enigmatic canon, riddle canon.

enigma canon (noun)	enigmatical canon (noun)
a canon in which the entrances of successive parts were indicated by cryptic symbols and devices (popular in the 15th and 16th centuries)	a canon in which the entrances of successive parts were indicated by cryptic symbols and devices (popular in the 15th and 16th centuries)