earmark vs set aside

earmark is a noun but set aside is not a noun.

Word	Noun	Adjective	Verb	Adverb
earmark	Yes	No	Yes	No
set aside	No	No	Yes	No

As verbs, earmark and set aside are synonyms defined as:

earmark and set aside: give or assign a resource to a particular person or cause

Other synonyms of earmark include allow, appropriate, reserve.

earmark (noun)	set aside (noun)
a distinctive characteristic or attribute of someone or something
identification mark on the ear of a domestic animal

earmark (verb)	set aside (verb)
give or assign a resource to a particular person or cause	make inoperative or stop
	give or assign a resource to a particular person or cause
	annul (a legal decision)