inattentive vs attention

inattentive is not a noun while attention is a noun.

Word	Noun	Adjective	Verb	Adverb
inattentive	No	Yes	No	No
attention	Yes	No	No	No

inattentive (noun)	attention (noun)
	the work of providing treatment for or attending to someone or something
	a courteous act indicating affection
	a motionless erect stance with arms at the sides and feet together; assumed by military personnel during drill or review
	the process whereby a person concentrates on some features of the environment to the (relative) exclusion of others
	the faculty or power of mental concentration
	a general interest that leads people to want to know more

inattentive (adjective)	attention (adjective)
showing a lack of attention or care
not showing due care or attention