Below you can find the Serenity fertility & tranquility are 3 of these large smooth areas Jeopardy Words Answer. The answer to Serenity fertility & tranquility are 3 of these large smooth areas has 4 letters. This clue belongs to the The moon category and is part of Jeopardy Word Level 293. If you scroll near the bottom you will find other clues and answers part of level 293