As nouns the difference between terms and atypical
is that terms is while atypical is (pharmacy) an atypical antipsychotic.
As an adjective atypical is
not conforming to the normal type.
terms
English
Noun
(head)
Statistics
*
----
atypical
English
Adjective
(
en adjective)
Not conforming to the normal type.
Unusual or irregular.
Noun
(
en noun)
(pharmacy) An atypical antipsychotic.