neuroleptic agent vs antipsychotic

neuroleptic agent and antipsychotic both are nouns.

Word	Noun	Adjective	Verb	Adverb
neuroleptic agent	Yes	No	No	No
antipsychotic	Yes	No	No	No

As nouns, neuroleptic agent and antipsychotic are synonyms defined as:

neuroleptic agent and antipsychotic: tranquilizer used to treat psychotic conditions when a calming effect is desired

neuroleptic agent (noun)	antipsychotic (noun)
tranquilizer used to treat psychotic conditions when a calming effect is desired	tranquilizer used to treat psychotic conditions when a calming effect is desired