brush up vs remember

brush up and remember both are verbs.

Word	Noun	Adjective	Verb	Adverb
brush up	No	No	Yes	No
remember	No	No	Yes	No

As verbs, remember is a hypernym of brush up; that is, remember is a word with a broader meaning than brush up:

Other hypernyms of brush up include call back, call up, recall, recollect, retrieve, think.

brush up (verb)	remember (verb)
bring to a highly developed, finished, or refined state	recall knowledge from memory; have a recollection
refresh one's memory	keep in mind for attention or consideration
	recapture the past; indulge in memories
	exercise, or have the power of, memory
	call to remembrance; keep alive the memory of someone or something, as in a ceremony
	mention as by way of greeting or to indicate friendship
	mention favorably, as in prayer
	show appreciation to