Here are some examples of words using this combining form:
* Adduction: Movement of a limb towards the midline of the body.
* Adrenal: Relating to the adrenal glands, which are located near the kidneys.
* Adhesive: Sticking together.
* Addendum: Something added or appended.
* Addict: A person who is dependent on a substance or activity.
Keep in mind that while "-add-" is the most common combining form for "addition," there are others that can also be used depending on the context. For example, "append-" can also indicate addition, as in "appendicitis" (inflammation of the appendix).