collateralize vs pledge

collateralize is not a noun while pledge is a noun.

Word	Noun	Adjective	Verb	Adverb
collateralize	No	No	Yes	No
pledge	Yes	No	Yes	No

As verbs, pledge is a hypernym of collateralize; that is, pledge is a word with a broader meaning than collateralize:

collateralize (noun)	pledge (noun)
	a binding commitment to do or give or refrain from something
	a drink in honor of or to the health of a person or event
	someone accepted for membership but not yet fully admitted to the group
	a deposit of personal property as security for a debt

collateralize (verb)	pledge (verb)
pledge as a collateral	promise solemnly and formally
	bind or secure by a pledge
	give as a guarantee
	propose a toast to
	pay (an amount of money) as a contribution to a charity or service, especially at regular intervals