Two species are phobic within some medium under some conditions when they don't here together (cohere if they're the same species; adhere otherwise). To be clear: phobic species don't really repel so much as they're not very attracted to each other. Species can become self-phobic. Of course, it's important to remember that members of the species aren't repulsing others of their own kind so much as just aren't very attracted to them. And then since they're not really attracted, they do the natural thing and just tend to disperse, filling the volume containing them. In other words, they vaporize. Water can be vaporized, e.g. through heating.
In the question I linked above the third answer says that since the water molecules do not attract each other in gaseous state they are hydrophobic. Even if the water molecules are not hydrophilic are they thus necessarily hydrophobic?