underline (n.)
- accent
- band
- bar
- blaze
- blemish
- blotch
- brand
- chalk
- check
- dapple
- dash
- delineation
- diagonal
- discolor
- dot
- feature
- fleck
- freckle
- gash
- hachure
- hairline
- hatch
- hatching
- highlight
- impress
- imprint
- legend
- line
- lineation
- mark
- mottle
- nick
- notch
- pencil
- pepper
- point
- prick
- punch
- puncture
- riddle
- scar
- score
- scotch
- scratch
- seal
- seam
- slash
- speck
- speckle
- splotch
- spot
- spotlight
- stain
- stamp
- star
- streak
- stress
- striate
- striation
- strip
- stripe
- striping
- stroke
- tattoo
- tick
- trace
- underscore
- virgule
underline (v.)
- accent
- accentuate
- band
- bar
- belabor
- blaze
- blemish
- blotch
- brand
- chalk
- check
- cicatrize
- dapple
- dash
- define
- delimit
- demarcate
- discolor
- dot
- emphasize
- engrave
- feature
- fleck
- freckle
- gash
- hatch
- highlight
- impress
- imprint
- italicize
- line
- mark
- mottle
- nick
- notch
- overemphasize
- overstress
- pencil
- pepper
- point
- prick
- punch
- punctuate
- puncture
- riddle
- scar
- scarify
- score
- scotch
- scratch
- seal
- seam
- slash
- speck
- speckle
- splotch
- spot
- spotlight
- stain
- stamp
- star
- stigmatize
- streak
- stress
- striate
- strip
- stripe
- stroke
- tattoo
- tick
- trace
- underscore