luxuriant vs luxuriance

luxuriant is not a noun while luxuriance is a noun.

Word	Noun	Adjective	Verb	Adverb
luxuriant	No	Yes	No	No
luxuriance	Yes	No	No	No

luxuriant (noun)	luxuriance (noun)
	the property of being lush and abundant and a pleasure to the senses

luxuriant (adjective)	luxuriance (adjective)
produced or growing in extreme abundance
marked by complexity and richness of detail
displaying luxury and furnishing gratification to the senses