earmark vs trademark

earmark and trademark both are nouns.

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

As nouns, earmark and trademark are synonyms defined as:

earmark and trademark: a distinctive characteristic or attribute of someone or something

Other synonyms of earmark include hallmark, stylemark.

earmark (noun)	trademark (noun)
a distinctive characteristic or attribute of someone or something	a distinctive characteristic or attribute of someone or something
identification mark on the ear of a domestic animal	a formally registered symbol identifying the manufacturer or distributor of a product

earmark (verb)	trademark (verb)
give or assign a resource to a particular person or cause	register the trademark of
	mark with a brand or trademark