Mirth, Amusement
This page is the CodyCross answer for the clue below from Pet Shop, Group 345, Puzzle 2 (Terrariums).
Question is: Mirth, Amusement
and the answer is: HILARITY
Word Meaning:
HILARITY — (uncountable) A great amount of amusement, usually accompanied by much laughter.
Definitions from Wiktionary.