thermodynamics vs cyclic

thermodynamics is a noun but cyclic is not a noun.

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

thermodynamics (noun)	cyclic (noun)
the branch of physics concerned with the conversion of different forms of energy

thermodynamics (adjective)	cyclic (adjective)
	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