salah vs salaat

salah and salaat both are nouns.

Word	Noun	Adjective	Verb	Adverb
salah	Yes	No	No	No
salaat	Yes	No	No	No

As nouns, salah and salaat are synonyms defined as:

salah and salaat: the second pillar of Islam is prayer; a prescribed liturgy performed five times a day (preferably in a mosque) and oriented toward Mecca

Other synonyms of salah include salaah, salat.

salah (noun)	salaat (noun)
the second pillar of Islam is prayer; a prescribed liturgy performed five times a day (preferably in a mosque) and oriented toward Mecca	the second pillar of Islam is prayer; a prescribed liturgy performed five times a day (preferably in a mosque) and oriented toward Mecca