rob vs bill

rob is not a noun while bill is a noun.

Word	Noun	Adjective	Verb	Adverb
rob	No	No	Yes	No
bill	Yes	No	Yes	No

rob (noun)	bill (noun)
	the entertainment offered at a public presentation
	horny projecting mouth of a bird
	a brim that projects to the front to shade the eyes
	a cutting tool with a sharp edge
	a sign posted in a public place as an advertisement
	an itemized statement of money owed for goods shipped or services rendered
	an advertisement (usually printed on a page or in a leaflet) intended for wide distribution
	a statute in draft before it becomes law
	a list of particulars (as a playbill or bill of fare)
	a piece of paper money (especially one issued by a central bank)

rob (verb)	bill (verb)
take something away by force or without the consent of the owner	advertise especially by posters or placards
rip off; ask an unreasonable price	publicize or announce by placards
	demand payment