salat vs salaah

salat and salaah both are nouns.

Word	Noun	Adjective	Verb	Adverb
salat	Yes	No	No	No
salaah	Yes	No	No	No

As nouns, salat and salaah are synonyms defined as:

salat and salaah: 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 salat include salaat, salah.

salat (noun)	salaah (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