As nouns the difference between brawniness and lustiness
is that brawniness is the state of being brawny or having brawn while lustiness is the property of having or experiencing lust, of being lusty.
brawniness
English
Noun
(-)
The state of being brawny or having brawn.
lustiness
English
Noun
(lustinesses)
The property of having or experiencing lust, of being lusty.