cyclic vs cyclical

cyclic and cyclical both are adjectives.

Word	Noun	Adjective	Verb	Adverb
cyclic	No	Yes	No	No
cyclical	No	Yes	No	No

As adjectives, cyclic and cyclical are synonyms defined as:

cyclic (adjective)	cyclical (adjective)
recurring in cycles	recurring in cycles
of a compound having atoms arranged in a ring structure
forming a whorl or having parts arranged in a whorl
conforming to the Carnot cycle
marked by repeated cycles