assign vs earmark

assign is not a noun while earmark is a noun.

Word	Noun	Adjective	Verb	Adverb
assign	No	No	Yes	No
earmark	Yes	No	Yes	No

As verbs, earmark is a hyponym of assign; that is, earmark is a word with a more specific, narrower meaning than assign:

Other hyponyms of assign include allow, appropriate, reserve, set aside, allocate, apportion.

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

assign (verb)	earmark (verb)
select something or someone for a specific purpose	give or assign a resource to a particular person or cause
attribute or credit to
decide as to where something belongs in a scheme
attribute or give
transfer one's right to
give out
make undue claims to having
give an assignment to (a person) to a post, or assign a task to (a person)