rotary vs cyclic

rotary is a noun but cyclic is not a noun.

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

rotary (noun)	cyclic (noun)
a road junction at which traffic streams circularly around a central island
electrical converter consisting of a synchronous machine that converts alternating to direct current or vice versa

rotary (adjective)	cyclic (adjective)
relating to or characterized by rotation	recurring in cycles
describing a circle; moving in a circle	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