usher out vs say farewell

usher out and say farewell both are verbs.

Word	Noun	Adjective	Verb	Adverb
usher out	No	No	Yes	No
say farewell	No	No	Yes	No

As verbs, say farewell is a hypernym of usher out; that is, say farewell is a word with a broader meaning than usher out:

usher out: end one's encounter with somebody by causing or permitting the person to leave
say farewell: say good-bye or bid farewell

usher out (verb)	say farewell (verb)
end one's encounter with somebody by causing or permitting the person to leave	say good-bye or bid farewell