The first poster will write: "1. nose", because most beings have only one nose. (Hey, you got a link to an animal with more than one nose then I'd like to know about it. )
et cetera for number 2, 3, et al. We're counting by integers, but it might be okay to let a "pi" in... let's try to keep things rational here. *bows for applause and laughter*
What to do when the number connotations run low? Suggestion time! Maybe Google searches. We'll figure it out.
I'm hoping these will be things that might be unarguable for that number, maybe even to be almost indistinguishable from that number (where possible).
There's no requirement to explain your choices, but you could, and others could ask. Because I might get curious and like to know.
If there's a disagreement that someone's word should not be considered correct for that number, either figure out a friendly resolution or let it be (as it's only a game).
This post is post zero, btw. My word is 0. anti-matter.
Edit: add numbers to your word. (I thought it would be neat to just have the word, but it's all kinds of confusing in here, so we'll keep track with those weirdly shaped arabian characters.)