Definition of

H2o

(noun, substance) binary compound that occurs at room temperature as a clear colorless odorless tasteless liquid; freezes into ice below 0 degrees centigrade and boils above 100 degrees centigrade; widely used as a solvent

via WordNet, Princeton University

Synonyms of H2o

Hyponyms: bath water, bilge, bilge water, brine, dishwater, distilled water, fresh water, freshwater, ground water, hard water, holy water, limewater, meltwater, saltwater, seawater, slush, soft water, spring water, tap water, water of crystallisation, water of crystallization, water of hydration, well water

Hypernyms: binary compound, liquid

suma_archie PR 31 - FINA World Aquatics Convention - 2nd edition - Moscow (RUS), October 29 - November 1, 2012 http://t.co/AIBzj8SV via @fina1908
SMGJr Dear "Mio" drink or whatever u are, I am not going to carry u around in a manpurse to flavor my h2o and your commercials are weird.
Nysha_boo14 @Lil_Red37 when I got mine the surface of mine was numb because of the h2o solution so I was watching them stick the needle through my tongu
billyoel @Tatii_h2o va sonriamole a la vida ps jajajaja