lugubriousness vs sadness

lugubriousness and sadness both are nouns.

Word	Noun	Adjective	Verb	Adverb
lugubriousness	Yes	No	No	No
sadness	Yes	No	No	No

As nouns, lugubriousness and sadness are synonyms defined as:

lugubriousness and sadness: the quality of excessive mournfulness and uncheerfulness

Other synonyms of lugubriousness include gloominess.

lugubriousness (noun)	sadness (noun)
the quality of excessive mournfulness and uncheerfulness	the quality of excessive mournfulness and uncheerfulness
	emotions experienced when not in a state of well-being
	the state of being sad