glacier ['glA-sh&r]
A huge mass of ice slowly flowing over a land mass, formed from compacted snow in an area where snow accumulation exceeds melting and sublimation

iceberg [ 'Is-"b&rg]
A massive floating body of ice broken away from a glacier. Only about 10 percent of its mass is above the surface of the water.

I just talked to Ate Tin-Tin like 15 minutes ago. She was taking a nature hike in Alaska (what the heck) by herself and she’s bored and frustrated and she's all venting:

Ate: I’m so sad, Anna. I haven’t even seen a glacier yet.
Anna: Are you sure? A glacier would look like a huge piece of land.
Ate: But I wanna see a glacier MADE OUT OF ICE!
Anna: A glacier IS made out of ice. You mean an iceberg?
Ate: HAHAHAHAHAHAHA!

Oh Ate, hurry up and come home. Hahahaha!