anomalous

Irregular is a synonym of anomalous.

As adjectives the difference between anomalous and irregular

is that anomalous is deviating from the normal; aberrant or abnormal while irregular is nonstandard; not conforming to rules or expectations.

As a noun irregular is

a soldier who is not a member of an official military force and, often, does not follow regular army tactics.

As adjectives the difference between anomalous and nonanomalous

is that anomalous is deviating from the normal; aberrant or abnormal while nonanomalous is not anomalous.

As an adjective anomalous

is deviating from the normal; aberrant or abnormal.

As a noun axp is

(star).