We don't have synonyms for salahs yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are salah, salads and salas.
(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.]