trademark vs hallmark

trademark and hallmark both are nouns.

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

As nouns, trademark and hallmark are synonyms defined as:

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

Other synonyms of trademark include earmark, stylemark.

trademark (noun)	hallmark (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	a mark on an article of trade to indicate its origin and authenticity

trademark (verb)	hallmark (verb)
register the trademark of
mark with a brand or trademark