salat vs pillar of Islam

salat and pillar of Islam both are nouns.

Word	Noun	Adjective	Verb	Adverb
salat	Yes	No	No	No
pillar of Islam	Yes	No	No	No

As nouns, pillar of Islam is a hypernym of salat; that is, pillar of Islam is a word with a broader meaning than salat:

salat: the second pillar of Islam is prayer; a prescribed liturgy performed five times a day (preferably in a mosque) and oriented toward Mecca
pillar of Islam: (Islam) one of the five religious obligations accepted by all Muslims

Other hypernyms of salat include worship.

salat (noun)	pillar of Islam (noun)
the second pillar of Islam is prayer; a prescribed liturgy performed five times a day (preferably in a mosque) and oriented toward Mecca	(Islam) one of the five religious obligations accepted by all Muslims