Atypical is a related term of nonconforming.
As adjectives the difference between atypical and nonconforming
is that atypical is not conforming to the normal type while nonconforming is that does not conform, either to the rules of an established church, or to official regulations.
As a noun atypical
is (pharmacy) an atypical antipsychotic.
atypical
English
Adjective
(
en adjective)
Not conforming to the normal type.
Unusual or irregular.
Noun
(
en noun)
(pharmacy) An atypical antipsychotic.
nonconforming
English
Adjective
(-)
That does not conform, either to the rules of an established church, or to official regulations