swot up vs grind away

swot up and grind away both are verbs.

Word	Noun	Adjective	Verb	Adverb
swot up	No	No	Yes	No
grind away	No	No	Yes	No

As verbs, swot up and grind away are synonyms defined as:

Other synonyms of swot up include bone, bone up, cram, drum, get up, mug up, swot.

swot up (verb)	grind away (verb)
study intensively, as before an exam	study intensively, as before an exam