wintry vs icy

wintry and icy both are adjectives.

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

As adjectives, wintry and icy are synonyms defined as:

wintry and icy: devoid of warmth and cordiality; expressive of unfriendliness or disdain

Other synonyms of wintry include frigid, frosty, frozen, glacial.

wintry (adjective)	icy (adjective)
characteristic of or occurring in winter	extremely cold
devoid of warmth and cordiality; expressive of unfriendliness or disdain	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