usher vs escort

usher and escort both are nouns.

Word	Noun	Adjective	Verb	Adverb
usher	Yes	No	Yes	No
escort	Yes	No	Yes	No

As nouns, escort is a hypernym of usher; that is, escort is a word with a broader meaning than usher:

usher (noun)	escort (noun)
someone employed to conduct others	the act of accompanying someone or something in order to protect them
an official stationed at the entrance of a courtroom or legislative chamber	a participant in a date
	someone who escorts and protects a prominent person
	an attendant who is employed to accompany someone

usher (verb)	escort (verb)
take (someone) to their seats, as in theaters or auditoriums	accompany as an escort
	conduct someone someplace