Water Lily 
The water lily is an ominous symbol. There will be a death in your life. Much sorrow and sadness will soon be yours.
Watermelon
To dream of a watermelon symbolizes your inner passion. You attack life with a furious passion. You love greatly, desire deeply, and lust for life of things around you. Pregnant or menstruating women often dream of the watermelon, or other such large fruits. Alternatively, the watermelon is a symbol for fun summer times. You are relaxed and at ease.
Waterslide
To dream that a waterslide has swept you away may indicate that you have allowed your emotions to get the best of you and are emotionally overwhelmed. It may also be an indication that you are getting in touch with your inner self. Conversely, it is an indication that you are not questioning your actions or putting proper thought into them. You are acting without forethought.
Salt Water
To dream of salty water on your tongue may indicate a need to release sadness and the physically shed tears.
To be standing in water suggests that an old emotional wound may be holding you back from possible joy. It also cautions acceptance of the past, especially of things that cannot be changed.
Water Hose
To be hit with a water hose in a dream symbolizes a surprise situation. Consider the phrase "getting hosed" where you have been overwhelmed or exhausted by a bad situation.
Alternatively, a water hose in a dream may symbolize sex or the male sex organ.
Water Park
A water park in a dream represents emotional intensity. For many, a trip to a water park represents great joy and a connection to childhood.
Alternatively, the rapid and twisted flow of water may symbolize inner turmoil and confusion.
Water Skiing
To dream of water skiing is a suggestion to learn how to trust yourself. The freedom that one feels while water skiing is something you are just beginning to experience in your waking life. You may have recently found peace in your spirituality.
Water Cooler
To visit the water cooler in a dream represents a break from your work.
To dream that you are watching a conversation at a water cooler indicates that you are worried what other people think about you.
Water Carrier
The water carrier is a symbol of great bounty. A large fortune or true love is in your future. If you are carrying the water, you will soon rise above your station. Great reward will soon be yours.
Water Balloon
A water balloon in a dream represents built up potential.
To hit someone with a water balloon in a dream represent unleashed emotion. To be hit by a water balloon in a dream indicates that others may be holding back their true feelings toward you.