ice mass vs formation

ice mass and formation both are nouns.

Word	Noun	Adjective	Verb	Adverb
ice mass	Yes	No	No	No
formation	Yes	No	No	No

As nouns, formation is a hypernym of ice mass; that is, formation is a word with a broader meaning than ice mass:

Other hypernyms of ice mass include geological formation.

ice mass (noun)	formation (noun)
a large mass of ice	the act of fabricating something in a particular shape
	the act of forming or establishing something
	creation by mental activity
	a particular spatial arrangement
	an arrangement of people or things acting as a unit
	(geology) the geological features of the earth
	natural process that causes something to form