hesitancy vs indisposition

hesitancy and indisposition both are nouns.

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

As nouns, hesitancy and indisposition are synonyms defined as:

Other synonyms of hesitancy include disinclination, hesitation, reluctance.

hesitancy (noun)	indisposition (noun)
a certain degree of unwillingness	a certain degree of unwillingness
a feeling of diffidence and indecision about doing something	a slight illness