What are some words end with the prefix ac?

You're asking about words ending in "ac", but that's not a prefix. It's actually a suffix!

Here are some words ending in "ac" (a suffix):

* Cardiac: Relating to the heart

* Diabetic: Having diabetes

* Dramatic: Relating to drama

* Fantastic: Extremely good or impressive

* Graphic: Relating to visual images

* Hydrophilic: Attracted to water

* Magnetic: Relating to magnetism

* Music: The art of sound

* Pediatric: Relating to children

* Psychiatric: Relating to the mind

* Telepathic: Communicating by telepathy

Remember, a prefix is added to the beginning of a word, while a suffix is added to the end.