consummation vs climax

consummation and climax both are nouns.

Word	Noun	Adjective	Verb	Adverb
consummation	Yes	No	No	No
climax	Yes	No	Yes	No

As nouns, climax is a hyponym of consummation; that is, climax is a word with a more specific, narrower meaning than consummation:

Other hyponyms of consummation include fruition, realisation, realization, coming, orgasm, sexual climax, fulfillment, fulfilment.

consummation (noun)	climax (noun)
the act of bringing to completion or fruition	the moment of most intense pleasure in sexual intercourse
the completion of marriage by sexual intercourse	the decisive moment in a novel or play
	arrangement of clauses in ascending order of forcefulness
	the highest point of anything conceived of as growing or developing or unfolding
	the most severe stage of a disease

consummation (verb)	climax (verb)
	end, especially to reach a final or climactic stage