We don't have synonyms for outgrew yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are outgrow and outdrew.
(v) :
(transitive, often figurative) To become too big in size or too mature in age or outlook to continue to want, need, use, experience, or accept some object, practice, condition, belief, etc.
(v) :
(transitive, often figurative) To become too big in size or too mature in age or outlook to continue to want, need, use, experience, or accept some object, practice, condition, belief, etc.