soil vs grease

soil and grease both are nouns.

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

As nouns, soil and grease are synonyms defined as:

Other synonyms of soil include dirt, filth, grime, grunge, stain.

soil (noun)	grease (noun)
the geographical area under the jurisdiction of a sovereign state	anything regarded as making something unclean
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 thick fatty oil (especially one used to lubricate machinery)
anything regarded as making something unclean
the part of the earth's surface consisting of humus and disintegrated rock

soil (verb)	grease (verb)
make soiled, filthy, or dirty	lubricate with grease