decomposition vs rotting

decomposition and rotting both are nouns.

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

As nouns, decomposition and rotting are synonyms defined as:

decomposition and rotting: (biology) the process of decay caused by bacterial or fungal action

Other synonyms of decomposition include breakdown, putrefaction, rot.

decomposition (noun)	rotting (noun)
the analysis of a vector field	(biology) the process of decay caused by bacterial or fungal action
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