Spit, Vomit
と
は, つ
None
If you put dirt in your mouth you're going to throw up. That's just a fact.
When you throw up it sounds like you're shouting, "HA (は)!" Then all the dirt-puke comes out in a wave. It's less of a laugh ha and more of an oh no I'm throwing up ha.
Currently there are no similar looking kanji which exist in the WaniKani learning system