languor vs easiness

languor and easiness both are nouns.

Word	Noun	Adjective	Verb	Adverb
languor	Yes	No	No	No
easiness	Yes	No	No	No

As nouns, easiness is a hypernym of languor; that is, easiness is a word with a broader meaning than languor:

languor: a relaxed comfortable feeling
easiness: a feeling of refreshing tranquility and an absence of tension or worry

Other hypernyms of languor include relaxation.

languor (noun)	easiness (noun)
inactivity; showing an unusual lack of energy	the quality of being easy in behavior or style
a relaxed comfortable feeling	freedom from difficulty or hardship or effort
a feeling of lack of interest or energy	a feeling of refreshing tranquility and an absence of tension or worry
oppressively still air