keenness (n.)
- acerbity
- acidity
- acidness
- acidulousness
- acridity
- acrimony
- acuity
- acumen
- acuteness
- adroitness
- agility
- alacrity
- alertness
- algidity
- animation
- anxiety
- anxiousness
- appetite
- aptitude
- aptness
- asperity
- astringency
- astuteness
- attention
- attentiveness
- avidity
- avidness
- bite
- bitterness
- bleakness
- brightness
- brilliance
- briskness
- chill
- chilliness
- cleverness
- cold
- coldness
- cool
- coolness
- crispness
- cryogenics
- dexterity
- discernment
- discrimination
- eagerness
- edge
- elan
- esprit
- facetiousness
- fierceness
- flair
- forwardness
- freshness
- frigidity
- frostiness
- funniness
- gelidity
- genius
- grip
- gust
- gusto
- harshness
- humorousness
- iciness
- impatience
- incisiveness
- inclemency
- jocoseness
- jocularity
- life
- liveliness
- mordacity
- nimbleness
- nip
- nous
- penetration
- perspicacity
- piquancy
- pleasantry
- poignancy
- point
- pointedness
- prickliness
- promptitude
- promptness
- punctuality
- pungency
- quick-wittedness
- quickness
- rawness
- readiness
- rigor
- roughness
- saltiness
- savvy
- severity
- sharpness
- shrewdness
- sleeplessness
- smartness
- smarts
- sourness
- spirit
- sting
- stridency
- stringency
- talent
- tartness
- teeth
- thorniness
- trenchancy
- vehemence
- verve
- violence
- virulence
- vitality
- vivacity
- wakefulness
- wit
- wittiness
- zest
- zestfulness
