trademark vs SK-Ampicillin

trademark and SK-Ampicillin both are nouns.

Word	Noun	Adjective	Verb	Adverb
trademark	Yes	No	Yes	No
SK-Ampicillin	Yes	No	No	No

trademark (noun)	SK-Ampicillin (noun)
a distinctive characteristic or attribute of someone or something	semisynthetic penicillin (trade names Principen and Polycillin and SK-Ampicillin)
a formally registered symbol identifying the manufacturer or distributor of a product

trademark (verb)	SK-Ampicillin (verb)
register the trademark of
mark with a brand or trademark