Substantiv
depression [pl. depressions]
gloom {iness}
grief [pl. griefs]
melancholy [pl. melancholies]
sadness [pl. sadnesses]
despondency [pl. despondencies]
mope [pl. mopes]
dump [pl. dumps]
drabness [pl. drabnesses]
depressiveness [pl. depressivenesss]
...
gloom {iness}
Adverb