Promptness is a related term of cheerfulness.
As nouns the difference between promptness and cheerfulness
is that promptness is the habit or characteristic of doing things without delay while cheerfulness is the state of being cheerful; joy.
promptness
English
Noun
(-)
The habit or characteristic of doing things without delay.
The habit of adhering to a designated time.
Synonyms
* (habit of doing things with out delay) promptitude
* (habit of adhering to a designated time) punctuality, timeliness
cheerfulness
English
Noun
(-)
The state of being cheerful; joy.