Merriment is a related term of joviality.
As nouns the difference between merriment and joviality
is that merriment is a state of enjoyable exuberance while joviality is the state of being jovial; jollity or conviviality.
merriment
English
Noun
a state of enjoyable exuberance
*
playful fun
*
joviality
English
Noun
The state of being jovial; jollity or conviviality