down in the mouth vs dispirited

down in the mouth and dispirited both are adjectives.

Word	Noun	Adjective	Verb	Adverb
down in the mouth	No	Yes	No	No
dispirited	No	Yes	No	No

As adjectives, down in the mouth and dispirited are synonyms defined as:

down in the mouth and dispirited: filled with melancholy and despondency

Other synonyms of down in the mouth include blue, depressed, down, downcast, downhearted, gloomy, grim, low-spirited, low.

down in the mouth (adjective)	dispirited (adjective)
filled with melancholy and despondency	filled with melancholy and despondency
	marked by low spirits; showing no enthusiasm