besmirch (v.)
- attaint
- bedaub
- besmear
- bespatter
- black
- blacken
- blackwash
- blot
- blotch
- blur
- brand
- charcoal
- cork
- darken
- daub
- defile
- denigrate
- dinge
- dirty
- discolor
- ebonize
- ink
- mark
- melanize
- muckrake
- murk
- revile
- scorch
- sear
- shade
- shadow
- singe
- slur
- smear
- smirch
- smoke
- smudge
- smut
- smutch
- soil
- soot
- spot
- stain
- stigmatize
- sully
- taint
- tar
- tarnish
- vilify
