icy vs glacial

icy and glacial both are adjectives.

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

As adjectives, icy and glacial are synonyms defined as:

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

As adjectives, icy and glacial are synonyms defined as:

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

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

icy (adjective)	glacial (adjective)
extremely cold	relating to or derived from a glacier
devoid of warmth and cordiality; expressive of unfriendliness or disdain	extremely cold
covered with or containing or consisting of ice	devoid of warmth and cordiality; expressive of unfriendliness or disdain
shiny and slick as with a thin coating of ice