antipsychotic agent vs neuroleptic

antipsychotic agent and neuroleptic both are nouns.

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

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

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

antipsychotic agent (noun)	neuroleptic (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