stain

[1]	blot , mark , spot , discolour , blotch , speckle , dye , spatter , splatter , tinge , smudge , smutch , splash
[2]	spoil , defile , ruin , smirch , besmirch , taint , tarnish , stigmatize , shame , disgrace , sully , contaminate , soil , corrupt
[3]	tarnish , maculate , sully , defile

[1]	discoloration , blot , mark , discolouration , spot , discoloration , blotch , smutch , smirch , speck , (Brit) splodge/(US) splotch
[2]	mark , blot (on the escutcheon) , stigma , blemish , (Brit) blot on one's copybook , (Colloq) (US) black eye
[3]	dye , dirt , filth , colour , colouring , grime , soil , tint , tinge , grease , grunge , pigment
[4]	mark , stigma , brand
[5]	blot , smear , smirch , spot