We don't have synonyms for in phase yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are in shape, inphase and in-phase.
jonathan Swift 1667-1745: "Why should he desire to have qualities infused into his son, which himself never possessed, or knew, or found the want of, in the acquisition of his wealth?"
jonathan Swift 1667-1745: "Why should he desire to have qualities infused into his son, which himself never possessed, or knew, or found the want of, in the acquisition of his wealth?"