ଅର୍ଥ : A disposition to behave in a certain way.
ଉଦାହରଣ :
The aptness of iron to rust.
The propensity of disease to spread.
ସମକକ୍ଷ : propensity
ଅର୍ଥ : Appropriateness for the occasion.
ଉଦାହରଣ :
The phrase had considerable aptness.
ସମକକ୍ଷ : appositeness
Inappropriateness.
Greater inaptness of expression would be hard to imagine.