Walkman vs trademark

Walkman and trademark both are nouns.

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

Walkman (noun)	trademark (noun)
(trademark) a pocket-sized stereo system with light weight earphones	a distinctive characteristic or attribute of someone or something
	a formally registered symbol identifying the manufacturer or distributor of a product

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