Collocations for graffiti - noun

obscene, offensive
racist

piece

daub (BrE), scrawl, spray, spray-paint, write
Racist graffiti was sprayed on the walls.

be covered in, be covered with, be daubed with (BrE), be sprayed with
The buildings were covered with graffiti.

clean, remove

artist
a fashionable graffiti artist

vandal