concentration vs attention

concentration and attention both are nouns.

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

As nouns, attention is a hypernym of concentration; that is, attention is a word with a broader meaning than concentration:

concentration (noun)	attention (noun)
strengthening the concentration (as of a solute in a mixture) by removing diluting material	the work of providing treatment for or attending to someone or something
bringing together military forces	a courteous act indicating affection
great and constant diligence and attention	a motionless erect stance with arms at the sides and feet together; assumed by military personnel during drill or review
the strength of a solution; number of molecules of a substance in a given volume	the process whereby a person concentrates on some features of the environment to the (relative) exclusion of others
the spatial property of being crowded together	the faculty or power of mental concentration
complete attention; intense mental effort	a general interest that leads people to want to know more
increase in density