Cheeriness and Fun

Cheeriness noun - A mood characterized by high spirits and amusement and often accompanied by laughter.

Fun and cheeriness are semantically related In some cases you can use "Fun" instead a noun "Cheeriness".

Fun noun - Someone or something that provides amusement or enjoyment.

Cheeriness and fun are semantically related in merriment topic. Sometimes you can use "Cheeriness" instead a noun "Fun".