pillar of strength vs patron

pillar of strength and patron both are nouns.

Word	Noun	Adjective	Verb	Adverb
pillar of strength	Yes	No	No	No
patron	Yes	No	No	No

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

pillar of strength: a person who can be relied on to give a great deal of support and comfort
patron: someone who supports or champions something

Other hypernyms of pillar of strength include sponsor, supporter.

pillar of strength (noun)	patron (noun)
a person who can be relied on to give a great deal of support and comfort	a regular customer
	someone who supports or champions something
	the proprietor of an inn