I often hear people say "salt water" rather than "salty water".
According to my study, "salt water" is water that has salt.
Say, I have a sore throat and I want to gargle with "salt water" or "salty water".
According to the dictionary, they say "Gargle with salt water if your throat is sore.".
There are 2 examples
Example 1: I add some salt into some water but I don't stir the water. And I am very sure that I can't gargle with that water because the salt has not dissolved in the water yet. Some part of that water is salty but others are not.
Example 2: I add some salt into some water and I stir the water. I am sure I can use this water because the salt has dissolved into the water.
So the water in example 1 and 2 is called "salt water" or "salty water".
When do we say "I stirred salt into water to make salty water" or "I stirred salt into water to make salt water"?
Also, why do most people say "I want to drink sugary milk" but not "I want to drink sugar milk"?