RichThesaurus
indolence
vs
somnolence
indolence
noun
Habitual laziness or sloth.
Lack of pain in a tumour.
somnolence
noun
A state of drowsiness or sleepiness.
How often have the words
indolence
and
somnolence
occurred in a corpus of books?
(source:
Google Ngram Viewer
)