subsumption vs subsume

subsumption is a noun but subsume is not a noun.

Word	Noun	Adjective	Verb	Adverb
subsumption	Yes	No	No	No
subsume	No	No	Yes	No

subsumption (noun)	subsume (noun)
incorporating something under a more general category
the premise of a syllogism that contains the minor term (which is the subject of the conclusion)

subsumption (verb)	subsume (verb)
	consider (an instance of something) as part of a general rule or principle
	contain or include