Synonyms of the word 
LUGUBRIOUSNESS → GLOOMINESS - SADNESS - UNCHEERFULNESS
lugubriousness
- n. The property of being lugubrious.
gloominess
- n. The state or condition of being gloomy.
sadness
- n. (uncountable) The state or emotion of being sad.
- n. (countable) An event in one's life that causes sadness.
uncheerfulness
- n. The state or condition of being uncheerful.
If you are interested in words, visit the following sites :
- wiktionary.org/lugubriousness For complete definition of a word
- 1word.ws/lugubriousness to play with words, suffixs, prefixs, etc.