concentration vs study

concentration and study both are nouns.

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

As nouns, study is a hyponym of concentration; that is, study is a word with a more specific, narrower meaning than concentration:

Other hyponyms of concentration include centering, centring, direction, focal point, focus, focusing, focussing, specialism.

concentration (noun)	study (noun)
strengthening the concentration (as of a solute in a mixture) by removing diluting material	a detailed critical inspection
bringing together military forces	a room used for reading and writing and studying
great and constant diligence and attention	preliminary drawing for later elaboration
the strength of a solution; number of molecules of a substance in a given volume	attentive consideration and meditation
the spatial property of being crowded together	a branch of knowledge
complete attention; intense mental effort	applying the mind to learning and understanding a subject (especially by reading)
increase in density	a state of deep mental absorption
	a written document describing the findings of some individual or group
	a composition intended to develop one aspect of the performer's technique
	someone who memorizes quickly and easily (as the lines for a part in a play)

concentration (verb)	study (verb)
	be a student of a certain subject
	learn by reading books
	consider in detail and subject to an analysis in order to discover essential features or meaning
	be a student; follow a course of study; be enrolled at an institute of learning
	think intently and at length, as for spiritual purposes
	give careful consideration to