sourness vs moroseness

sourness and moroseness both are nouns.

Word	Noun	Adjective	Verb	Adverb
sourness	Yes	No	No	No
moroseness	Yes	No	No	No

As nouns, sourness and moroseness are synonyms defined as:

Other synonyms of sourness include sulkiness, sullenness.

sourness (noun)	moroseness (noun)
the property of being acidic	a sullen moody resentful disposition
a sullen moody resentful disposition	a gloomy ill-tempered feeling
the taste experience when vinegar or lemon juice is taken into the mouth