iceberg

1. A huge mass of ocean-floating ice which has broken off a glacier or ice shelf · The Titanic hit an iceberg and sank.
2. An aloof person. (US, slang)
3. An impending disastrous event whose adverse effects are only beginning to show. (figuratively)
4. A topic that is more convoluted and fractal than it may seem. (figuratively, slang) · Near-synonym: rabbit hole· Do some digging into that politician's past life and associates, and you'll see that the iceberg runs deep.
5. A list, infographic, or other enumeration of such a topic and its subcomponents, often ordered into groups sorted by obscurity and bizarreness. (figuratively, slang) · Check out the gaming iceberg on this post! There's some really freaky titles there that I've never heard of.· Today we're gonna talk about the Star Wars iceberg.

Plural icebergs