trademark vs Link trainer

trademark and Link trainer both are nouns.

Word	Noun	Adjective	Verb	Adverb
trademark	Yes	No	Yes	No
Link trainer	Yes	No	No	No

trademark (noun)	Link trainer (noun)
a distinctive characteristic or attribute of someone or something	an early form of flight simulator
a formally registered symbol identifying the manufacturer or distributor of a product

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