trademark vs iPad

trademark and iPad both are nouns.

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

trademark (noun)	iPad (noun)
a distinctive characteristic or attribute of someone or something	a table computer from Apple Inc
a formally registered symbol identifying the manufacturer or distributor of a product

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