Yahoo! vs trademark

Yahoo! and trademark both are nouns.

Word	Noun	Adjective	Verb	Adverb
Yahoo!	Yes	No	No	No
trademark	Yes	No	Yes	No

Yahoo! (noun)	trademark (noun)
a widely used search engine for the web that finds information, news, images, products, finance	a distinctive characteristic or attribute of someone or something
	a formally registered symbol identifying the manufacturer or distributor of a product

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