entryphone vs trademark

entryphone and trademark both are nouns.

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

entryphone (noun)	trademark (noun)
An intercom system which enables someone, without opening the door, to converse with the person who has rung the doorbell.	a distinctive characteristic or attribute of someone or something
	a formally registered symbol identifying the manufacturer or distributor of a product

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