decompose vs decomposition

decompose is not a noun while decomposition is a noun.

Word	Noun	Adjective	Verb	Adverb
decompose	No	No	Yes	No
decomposition	Yes	No	No	No

decompose (noun)	decomposition (noun)
	the analysis of a vector field
	the organic phenomenon of rotting
	(biology) the process of decay caused by bacterial or fungal action
	(chemistry) separation of a substance into two or more substances that may differ from each other and from the original substance
	in a decomposed state

decompose (verb)	decomposition (verb)
separate (substances) into constituent elements or parts
break down
lose a stored charge, magnetic flux, or current