4 synonyms are shallows, pond, pool, and gulf.
solid, cemented
drain it, chip out around crack repair it with a cement sealer.
glue, adhesive, resin, cement, paste
mortar, plaster, paste, sealant, glue, gum, adhesive
One slang term for a pool is a cement pond.
A pond heater is used to keep your pond from freezing solid in the winter. A frozen solid pond is bad for your pool liners, koi, and for some pool structures that may use cement.
Possibly if you find out somehow
mix, join, combine, compound, merge, unite, mingle, amalgamateinterpits
The terms are sometimes used as synonyms, but in general usage ponds are smaller than lakes.
I can get an outdoor pond by digging on in my back yard. FIrst, dig a large hole, the shape of your pool and its depth. NExt, fill he hole with cement so it can take the shape of your pool. FInally, add water and you have yourself an outdoor pool.
Depends how big, but what you could fo is make a hole, put a tarp in it and then put sand on the bottom and then fill it with water. Answer Normally this is done with cement. You would dig the hole, pour the cement floor and then sculpt the walls and the area that is level with the ground. A person that works with plaster in homes to plaster walls ( a dying profession with the invention of sheet rock), would know how to do this for you. Basically you would wind up with a cement pond that is actually a swimming pool.