slothfulness vs reluctance

slothfulness and reluctance both are nouns.

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

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

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

slothfulness (noun)	reluctance (noun)
a disinclination to work or exert yourself	a certain degree of unwillingness
	(physics) opposition to magnetic flux (analogous to electric resistance)