The action of subscribe, v. (in various senses); subscription.

The action of assenting to the opinions of another; esp. obsequious or servile expression or act of assent.

The action of agreeing to a proposal; agreement, bargain.

The action of giving assent, acquiescence.

The action or an act of acceding to something (in various senses of the verb).

The action of saying ‘yea’ to something; (hence) assent, agreement; positive response or reaction.