torpor vs listlessness

torpor and listlessness both are nouns.

Word	Noun	Adjective	Verb	Adverb
torpor	Yes	No	No	No
listlessness	Yes	No	No	No

As nouns, torpor and listlessness are synonyms defined as:

torpor and listlessness: inactivity resulting from lethargy and lack of vigor or energy

Other synonyms of torpor include torpidity, torpidness.

torpor (noun)	listlessness (noun)
inactivity resulting from lethargy and lack of vigor or energy	inactivity resulting from lethargy and lack of vigor or energy
a state of motor and mental inactivity with a partial suspension of sensibility	a feeling of lack of interest or energy