zakat vs pillar of Islam

zakat and pillar of Islam both are nouns.

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

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

zakat: the fourth pillar of Islam is almsgiving as an act of worship
pillar of Islam: (Islam) one of the five religious obligations accepted by all Muslims

Other hypernyms of zakat include charity.

zakat (noun)	pillar of Islam (noun)
the fourth pillar of Islam is almsgiving as an act of worship	(Islam) one of the five religious obligations accepted by all Muslims