trademark vs earmark

trademark and earmark both are nouns.

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

As nouns, trademark and earmark are synonyms defined as:

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

Other synonyms of trademark include hallmark, stylemark.

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

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