astringent (n.)
astringent (adj.)
- acerb
 - acerbic
 - acid
 - acidulous
 - acrid
 - acrimonious
 - ascetic
 - austere
 - authoritarian
 - biting
 - bitter
 - brisk
 - caustic
 - coarse
 - collapsible
 - compressible
 - consumptive
 - contractile
 - cutting
 - deflationary
 - demanding
 - double-edged
 - dour
 - edged
 - exacting
 - exigent
 - fierce
 - foldable
 - grim
 - hard
 - harsh
 - incisive
 - inclement
 - irritating
 - keen
 - meticulous
 - mordacious
 - mordant
 - mortified
 - penetrating
 - piercing
 - piquant
 - poignant
 - pungent
 - restorative
 - rigorous
 - roborant
 - rough
 - rugged
 - scathing
 - severe
 - sharp
 - sour
 - stabbing
 - stern
 - stinging
 - strict
 - strident
 - stringent
 - styptic
 - tart
 - tough
 - trenchant
 - ungentle
 - unsparing
 - vehement
 - violent
 - virulent
 - vitriolic