[notpushkin]

Button may be a verb, but it doesn't have to. Generally, buttons represent one of three things:

1. an action – this is usually a verb in the imperative mood (e.g. Reply, Save, Add to basket)

2. a status – those omit the verb and only specify the new state of an object, which might be a lot of things, like a noun (Spam), an adjective (Favourite) or maybe an adverb (In progress, Later)

3. a navigation item – on the Web, this is better represented as a link, so let's not go into this here

I would argue that "with/without sound" is a clear example of a status here.

[sublinear]

It's still way clearer to not omit the verb. "Report spam" vs just "Spam".

Also links are not buttons. There's nothing to get into here. It's straight up wrong from every perspective to think of a link as a button even from an accessibility standpoint.