Turlough
The Century Dictionary and Cyclopedia
noun.
In Ireland, a temporary pond or lake in certain limestone districts.
Wiktionary, Creative Commons Attribution/Share-Alike License
noun.
A temporary
lake
Word Usage
"It turns out the lake isn’t really a lake but a turlough, which is sometimes a lake, and dry at other times of the year."
Rhyme
Words with the same terminal sound
furlough