decomposition vs biological science

decomposition and biological science both are nouns.

Word	Noun	Adjective	Verb	Adverb
decomposition	Yes	No	No	No
biological science	Yes	No	No	No

decomposition (noun)	biological science (noun)
the analysis of a vector field	the science that studies living organisms
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