student vs memoriser

student and memoriser both are nouns.

Word	Noun	Adjective	Verb	Adverb
student	Yes	No	No	No
memoriser	Yes	No	No	No

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

student: someone (especially a child) who learns (as from a teacher) or takes up knowledge or beliefs
memoriser: a person who learns by rote

Other hyponyms of student include memorizer, quick study, sponge, dweeb, grind, nerd, swot, wonk, tutee.

student (noun)	memoriser (noun)
a learner who is enrolled in an educational institution	a person who learns by rote
someone (especially a child) who learns (as from a teacher) or takes up knowledge or beliefs