indifference vs stolidity

indifference and stolidity both are nouns.

Word	Noun	Adjective	Verb	Adverb
indifference	Yes	No	No	No
stolidity	Yes	No	No	No

As nouns, indifference and stolidity are synonyms defined as:

indifference and stolidity: apathy demonstrated by an absence of emotional reactions

Other synonyms of indifference include emotionlessness, impassiveness, impassivity, phlegm, unemotionality.

indifference (noun)	stolidity (noun)
the trait of lacking enthusiasm for or interest in things generally	an indifference to pleasure or pain
the trait of remaining calm and seeming not to care; a casual lack of concern	apathy demonstrated by an absence of emotional reactions
unbiased impartial unconcern
apathy demonstrated by an absence of emotional reactions