optative mood vs mood

optative mood and mood both are nouns.

Word	Noun	Adjective	Verb	Adverb
optative mood	Yes	No	No	No
mood	Yes	No	No	No

As nouns, mood is a hypernym of optative mood; that is, mood is a word with a broader meaning than optative mood:

optative mood: a mood (as in Greek or Sanskrit) that expresses a wish or hope; expressed in English by modal verbs
mood: verb inflections that express how the action or state is conceived by the speaker

Other hypernyms of optative mood include modality, mode.

optative mood (noun)	mood (noun)
a mood (as in Greek or Sanskrit) that expresses a wish or hope; expressed in English by modal verbs	a characteristic (habitual or relatively temporary) state of feeling
	verb inflections that express how the action or state is conceived by the speaker
	the prevailing psychological state