We don't have synonyms for salah yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are salad, sarah and Sarah.
(n) :
Alternative form of salat. [(Islam) The obligatory prayer that Muslims are called to perform five times a day and the second of the five pillars of Islam.]
(n) :
Alternative form of salat. [(Islam) The obligatory prayer that Muslims are called to perform five times a day and the second of the five pillars of Islam.]