icy vs arctic

icy is not a noun while arctic is a noun.

Word	Noun	Adjective	Verb	Adverb
icy	No	Yes	No	No
arctic	Yes	Yes	No	No

As adjectives, icy and arctic are synonyms defined as:

Other synonyms of icy include frigid, gelid, glacial, polar.

icy (noun)	arctic (noun)
	a waterproof overshoe that protects shoes from water or snow

icy (adjective)	arctic (adjective)
extremely cold	extremely cold
devoid of warmth and cordiality; expressive of unfriendliness or disdain
covered with or containing or consisting of ice
shiny and slick as with a thin coating of ice