sloth vs reluctance

sloth and reluctance both are nouns.

Word	Noun	Adjective	Verb	Adverb
sloth	Yes	No	No	No
reluctance	Yes	No	No	No

As nouns, reluctance is a hypernym of sloth; that is, reluctance is a word with a broader meaning than sloth:

Other hypernyms of sloth include disinclination, hesitancy, hesitation, indisposition.

sloth (noun)	reluctance (noun)
apathy and inactivity in the practice of virtue (personified as one of the deadly sins)	a certain degree of unwillingness
any of several slow-moving arboreal mammals of South America and Central America; they hang from branches back downward and feed on leaves and fruits	(physics) opposition to magnetic flux (analogous to electric resistance)
a disinclination to work or exert yourself