inanition vs lassitude

inanition and lassitude both are nouns.

Word	Noun	Adjective	Verb	Adverb
inanition	Yes	No	No	No
lassitude	Yes	No	No	No

As nouns, inanition and lassitude are synonyms defined as:

inanition and lassitude: weakness characterized by a lack of vitality or energy

Other synonyms of inanition include lethargy, slackness.

inanition (noun)	lassitude (noun)
exhaustion resulting from lack of food	weakness characterized by a lack of vitality or energy
weakness characterized by a lack of vitality or energy	a feeling of lack of interest or energy
	a state of comatose torpor (as found in sleeping sickness)