Common words:
* anarchy: a state of disorder due to absence or non-recognition of authority.
* anesthetic: a substance that causes loss of sensation.
* anchor: a heavy object attached to a vessel by a cable and used to hold it in place.
* ancient: belonging to a very long time ago.
* angel: a supernatural being, often represented as a messenger from God.
* angry: feeling or showing strong displeasure and antagonism.
* animal: a living organism that feeds on organic matter, typically having specialized sense organs and nervous systems and able to respond rapidly to stimuli.
* another: one more; a different one.
* answer: a reply to a question.
* antidote: a remedy to counteract the effects of poison.
* antonym: a word that means the opposite of another word.
* anxiety: a feeling of worry, nervousness, or unease.
* anything: something of any kind.
* anywhere: any place.
Less common words:
* anachronism: something that is chronologically out of place.
* anagram: a word or phrase formed by rearranging the letters of another word or phrase.
* analogous: similar or alike in some way.
* anemia: a condition in which there is a deficiency of red blood cells or hemoglobin.
* anesthesia: a state of partial or complete loss of sensation.
* anthology: a collection of literary works.
* anthropology: the study of human societies and their cultures.
* antibody: a protein produced by the immune system in response to an antigen.
* anticipate: to expect something to happen.
* antidote: a remedy to counteract the effects of poison.
* antipathy: a strong feeling of dislike.
* antiseptic: a substance that prevents the growth of microorganisms.
* antisocial: not enjoying or seeking the company of others.
* anomaly: something that deviates from the standard or norm.
* anonymity: the state of being unknown.
* antagonize: to make someone hostile.
This list is not exhaustive, but it gives you a good starting point. There are many other words using the prefix "an" that could be listed.
Do you have a specific word in mind that you want to see if it uses the prefix "an"?