icetray vs tray

icetray and tray both are nouns.

Word	Noun	Adjective	Verb	Adverb
icetray	Yes	No	No	No
tray	Yes	No	No	No

As nouns, tray is a hypernym of icetray; that is, tray is a word with a broader meaning than icetray:

icetray: a tray for making cubes of ice in a refrigerator
tray: an open receptacle for holding or displaying or serving articles or food

icetray (noun)	tray (noun)
a tray for making cubes of ice in a refrigerator	an open receptacle for holding or displaying or serving articles or food