run up vs button

run up is not a noun while button is a noun.

Word	Noun	Adjective	Verb	Adverb
run up	No	No	Yes	No
button	Yes	No	Yes	No

run up (noun)	button (noun)
	a round fastener sewn to shirts and coats etc to fit through buttonholes
	an electrical switch operated by pressing
	a device that when pressed will release part of a mechanism
	any artifact that resembles a button
	a specific area or icon in graphical user interface systems that is clicked or pressed in order to select a command or perform an action
	a female sexual organ homologous to the penis
	a round flat badge displaying information and suitable for pinning onto a garment
	any of various plant parts that resemble buttons

run up (verb)	button (verb)
pile up (debts or scores)	fasten with buttons
raise by using ropes and pulleys	provide with buttons
fasten by sewing; do needlework
make by sewing together quickly
accumulate, sometimes as a debt