My world has a conlang that heavily emphasizes words in 'grades' of 5. For example the words for issues are grouped as: Danger-Threat-Risk-Hazard-Situation.
Usually it isn't hard to find a set of things in groups of 5, since you can always move delineation points (e.g. drinks by alcohol content is Juice-Beer-Wine-Vodka-Spirits, skipping over a lot, but still a general sense).
I have hit a brick wall when it comes to biomes though. In order to make it work I would like to create a 5x5 grid of biomes. Using a temperature/precipitation chart I was able to get up to:
╔════════╦════════╦═════════════╦══════════════════╦══════════════════════╦══════════════════════════╗ ║ ║ Colder ║ ║ ║ ║ Hotter ║ ╠════════╬════════╬═════════════╬══════════════════╬══════════════════════╬══════════════════════════╣ ║ Wetter ║ ? ║ ? ║ ? ║ ? ║ Tropical Rainforest ║ ╠════════╬════════╬═════════════╬══════════════════╬══════════════════════╬══════════════════════════╣ ║ ║ ? ║ ? ║ ? ║ Temperate Rainforest ║ Swamp ║ ╠════════╬════════╬═════════════╬══════════════════╬══════════════════════╬══════════════════════════╣ ║ ║ ? ║ ? ║ Temperate Forest ║ ??? ║ Tropical Seasonal Forest ║ ╠════════╬════════╬═════════════╬══════════════════╬══════════════════════╬══════════════════════════╣ ║ ║ ? ║ Taiga ║ Grassland ║ Woodland ║ Savanna ║ ╠════════╬════════╬═════════════╬══════════════════╬══════════════════════╬══════════════════════════╣ ║ Drier ║ Tundra ║ Cold Desert ║ Shrubland ║ ??? ║ Hot Desert ║ ╚════════╩════════╩═════════════╩══════════════════╩══════════════════════╩══════════════════════════╝
As you can see I was easily able to fill in the hotter/drier side of the table, missing just a few biomes where I just have yet to come up with a good name due to unusual delineation points. My bigger issue is that entire upper triangle. I guess earth just doesn't have many cold, wet biomes? I can't think of a physics oriented reason why - which leads me to think it is semantic (we don't live anywhere that cold, so we just lump all cold climates into "tundra/taiga").
Is there any way to come up with good words to describe cold/wet climates? Are they even possible? The language exists on a custom planet, so if the biomes could exist but just don't on earth all I need to do is 'create' them and come up with a good name for them (e.g. flowerscape if a biome caused mostly flowers as flora).