Rightfulness is a related term of faithfulness.
As nouns the difference between rightfulness and faithfulness
is that rightfulness is the state or quality of being rightful while faithfulness is the state of being faithful; allegiance; loyalty; fidelity.
rightfulness
English
Noun
(-)
The state or quality of being rightful.
faithfulness
English
Noun
(-)
The state of being faithful; allegiance; loyalty; fidelity.