You post a word, the person after you posts what the first thing they thought of was, followed by another word. It doesn't have to be related to the previous word, but try to make it something a good number of people will understand! (Don't include some out-there word like "concatenate.")
Example: User 1 posts "flush," user 2 might respond with "toilet" or "poker." User 2 then posts "repair."
Got it? Good.
First word: Triangle