study vs bethink

study is a noun but bethink is not a noun.

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

study (noun)	bethink (noun)
a detailed critical inspection
a room used for reading and writing and studying
preliminary drawing for later elaboration
attentive consideration and meditation
a branch of knowledge
applying the mind to learning and understanding a subject (especially by reading)
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)

study (verb)	bethink (verb)
be a student of a certain subject	consider or ponder something carefully
learn by reading books	cause oneself to consider something
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