swot vs grind away

swot is a noun but grind away is not a noun.

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

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

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

swot (noun)	grind away (noun)
an insignificant student who is ridiculed as being affected or boringly studious

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