General:
* Comprising
* Containing
* Encompassing
* Embracing
* Incorporating
* Featuring
* Consisting of
* Made up of
* Composed of
More specific:
* Adding (if it's something being added to a list)
* Adding to (if something is being added to an existing set)
* Bringing in (if it's something being brought into consideration)
* Bringing together (if something is being combined with others)
* Covering (if it's a range of things being covered)
* Representing (if it's something that's being used as an example)
The best synonym will depend on the specific situation and the meaning you're trying to convey.