asperity (n.)
- acerbity
- acid
- acidity
- acidness
- acidulousness
- acridity
- acrimony
- anger
- animosity
- astringency
- austerity
- bile
- biliousness
- bitterness
- bumpiness
- choler
- choppiness
- discontent
- edge
- gall
- granulation
- grimness
- hardness
- hardship
- harshness
- heartburning
- incisiveness
- inclemency
- inequality
- irregularity
- irritability
- jaggedness
- keenness
- mordacity
- nonuniformity
- piquancy
- poignancy
- pungency
- raggedness
- rancor
- rigor
- roughness
- ruggedness
- severity
- sharpness
- snappishness
- soreness
- sourness
- spleen
- stringency
- tartness
- tooth
- trenchancy
- turbulence
- unevenness
- vicissitude
- virulence
