acerbic (adj.)
- acerb
- acetose
- acid
- acidic
- acidulent
- acidulous
- acrid
- acrimonious
- astringent
- biting
- bitter
- burning
- caustic
- choleric
- coarse
- corrosive
- crabbed
- cutting
- dry
- green
- hard
- harsh
- incisive
- irritating
- keen
- mordacious
- mordant
- penetrating
- pickled
- piercing
- piquant
- poignant
- pungent
- rancorous
- resentful
- rough
- scathing
- scorching
- sec
- severe
- sharp
- sore
- sour
- soured
- sourish
- splenetic
- stabbing
- stinging
- tart
- trenchant
- unripe
- unsweet
- unsweetened
- vinegarish
- vinegary
- virulent
- vitriolic
- withering
