grime vs smear

grime and smear both are nouns.

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

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

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

grime (noun)	smear (noun)
anything regarded as making something unclean	an act that brings discredit to the person who does it
	a blemish made by dirt
	a thin tissue or blood sample spread on a glass slide and stained for cytologic examination and diagnosis under a microscope
	slanderous defamation

grime (verb)	smear (verb)
make soiled, filthy, or dirty	charge falsely or with malicious intent; attack the good name and reputation of someone
	make a smudge on; soil by smudging
	stain by smearing or daubing with a dirty substance
	cover (a surface) by smearing (a substance) over it