rider vs omnibus

rider and omnibus both are nouns.

Word	Noun	Adjective	Verb	Adverb
rider	Yes	No	No	No
omnibus	Yes	Yes	No	No

rider (noun)	omnibus (noun)
a clause that is appended to a legislative bill	a vehicle carrying many passengers; used for public transport
a traveler who actively rides an animal (as a horse or camel)	an anthology of articles on a related subject or an anthology of the works of a single author
a traveler riding in a vehicle (a boat or bus or car or plane or train etc) who is not operating it
a traveler who actively rides a vehicle (as a bicycle or motorcycle)

rider (adjective)	omnibus (adjective)
	providing for many things at once