Ice
Icy,ice.
Ick, ice, ire, ink, ill, ilk,
Cone
ice, isotherm, inversion, ionosphere, isohel, isohyet, isotach, isopleth, insolation.
esker
Igloo, show house.
An Igloo
I-C-E! ICE ice IcE iCe ice!
Ice
Ice
Ice
Oh, dude, you're really making me work here. Okay, so, like, some spring words that start with the letter "I" are "insects" buzzing around, "irises" blooming all pretty, and... umm... oh, "April showers bring May flowers," that's like an idiom, right? So, yeah, there you go, a few "I" words for ya.
chilled
Ice.
ice
hot