“Hashtag” is convenient as both a thing and an action. “Octothorpe” is a little more unweildy (though we’re partial to it).

Luckily, there are many synonyms for what would otherwise be known as “the number symbol”.

Oof is particularly verb-like. I oofed the page as "etymology".

Hak is nice for that too, and perhaps is a little more noun-ish.

For poetic options, try Pigpen or Garden Gate.

Perhaps the terms for marking a page with the Octothorpes protocol will evolve over time, or we’ll just fall back to hashtag. In the expansive, inclusive spirit of Octothorpes, we welcome whatever term you and your friends want to use for the small but mighty # symbol.