reluctance vs hesitancy

reluctance and hesitancy both are nouns.

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

As nouns, reluctance and hesitancy are synonyms defined as:

Other synonyms of reluctance include disinclination, hesitation, indisposition.

reluctance (noun)	hesitancy (noun)
a certain degree of unwillingness	a certain degree of unwillingness
(physics) opposition to magnetic flux (analogous to electric resistance)	a feeling of diffidence and indecision about doing something