grime vs contaminate

grime is a noun but contaminate is not a noun.

Word	Noun	Adjective	Verb	Adverb
grime	Yes	No	Yes	No
contaminate	No	No	Yes	No

As verbs, contaminate is a hyponym of grime; that is, contaminate is a word with a more specific, narrower meaning than grime:

Other hyponyms of grime include foul, foul, pollute, smear, slime, muddy, muddy up, splash, mire, muck, muck up, mud, crock, blemish, spot.

grime (noun)	contaminate (noun)
anything regarded as making something unclean

grime (verb)	contaminate (verb)
make soiled, filthy, or dirty	make impure
	make radioactive by adding radioactive material