Preexist

• (v. i.) To exist previously; to exist before something else.
Found on http://thinkexist.com/dictionary/meaning/preexist/

Preëxist

Pre`ëx·ist' intransitive verb [ imperfect & past participle Preëxisted ; present participle & verbal noun Preëxisting .] To exist previously; to exist before something else.
Found on http://www.encyclo.co.uk/webster/P/148

preexist

[v] - exist beforehand or prior to a certain point in time
Found on http://www.webdictionary.co.uk/definition.php?query=preexist
No exact match found