trademark vs Sharpie

trademark and Sharpie both are nouns.

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

As nouns, Sharpie is a hyponym of trademark; that is, Sharpie is a word with a more specific, narrower meaning than trademark:

trademark: a formally registered symbol identifying the manufacturer or distributor of a product
Sharpie: a pen with indelible ink that will write on any surface

Other hyponyms of trademark include logo, logotype.

trademark (noun)	Sharpie (noun)
a distinctive characteristic or attribute of someone or something	a pen with indelible ink that will write on any surface
a formally registered symbol identifying the manufacturer or distributor of a product

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