hallmark vs trademark

hallmark and trademark both are nouns.

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

As nouns, hallmark and trademark are synonyms defined as:

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

Other synonyms of hallmark include earmark, stylemark.

hallmark (noun)	trademark (noun)
a distinctive characteristic or attribute of someone or something	a distinctive characteristic or attribute of someone or something
a mark on an article of trade to indicate its origin and authenticity	a formally registered symbol identifying the manufacturer or distributor of a product

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