panorama vs tableau

panorama and tableau both are nouns.

Word	Noun	Adjective	Verb	Adverb
panorama	Yes	No	No	No
tableau	Yes	No	No	No

As nouns, tableau is a hyponym of panorama; that is, tableau is a word with a more specific, narrower meaning than panorama:

Other hyponyms of panorama include background, ground, coast, exposure, foreground, glimpse, middle distance, side view.

panorama (noun)	tableau (noun)
a picture (or series of pictures) representing a continuous scene	any dramatic scene
the visual percept of a region	a group of people attractively arranged (as if in a painting)