soil vs smear

soil and smear both are nouns.

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

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

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

soil (noun)	smear (noun)
the geographical area under the jurisdiction of a sovereign state	an act that brings discredit to the person who does it
material in the top layer of the surface of the earth in which plants can grow (especially with reference to its quality or use)	a blemish made by dirt
anything regarded as making something unclean	a thin tissue or blood sample spread on a glass slide and stained for cytologic examination and diagnosis under a microscope
the part of the earth's surface consisting of humus and disintegrated rock	slanderous defamation

soil (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