manic-depressive psychosis vs manic depression

manic-depressive psychosis and manic depression both are nouns.

Word	Noun	Adjective	Verb	Adverb
manic-depressive psychosis	Yes	No	No	No
manic depression	Yes	No	No	No

As nouns, manic-depressive psychosis and manic depression are synonyms defined as:

manic-depressive psychosis and manic depression: a mental disorder characterized by episodes of mania and depression

Other synonyms of manic-depressive psychosis include bipolar disorder, manic depressive illness.

manic-depressive psychosis (noun)	manic depression (noun)
a mental disorder characterized by episodes of mania and depression	a mental disorder characterized by episodes of mania and depression