snow vs snowy

snow is a noun but snowy is not a noun.

Word	Noun	Adjective	Verb	Adverb
snow	Yes	No	Yes	No
snowy	No	Yes	No	No

snow (noun)	snowy (noun)
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precipitation falling from clouds in the form of ice crystals
a layer of snowflakes (white crystals of frozen water) covering the ground

snow (adjective)	snowy (adjective)
	of the white color of snow
	covered with snow
	marked by the presence of snow

snow (verb)	snowy (verb)
conceal one's true motives from especially by elaborately feigning good intentions so as to gain an end
fall as snow