To put with what is already there. Addition changes the whole without altering what was there before.

Both of these, together. The word that adds without ranking.

To place a thing into what already stands. First a graft: a living shoot joined into established stock so the two grow as one.

Many. A part placed at the front to make a thing plural.

The joining word of addition — this and also that; arithmetic's welcome.

The whole amount when everything is counted. A total is only as honest as the set it counted.

Alongside, or by means of. Names accompaniment or instrument.