* Anhydrous isopropanol is isopropyl alcohol that has had all or nearly all of the water removed. It is essentially pure isopropyl alcohol.

* Isopropyl is a shortened term for isopropyl alcohol. Isopropyl alcohol is a common name for the chemical compound with the formula (CH3)2CHOH. It is a colorless, flammable liquid with a strong odor.

So, while both relate to isopropyl alcohol, "anhydrous isopropanol" refers to a specific form of isopropyl alcohol with a very low water content.