| Synonym | English |
|---|---|
| keen adjective | bang-upadjective corkingadjective exquisiteadjective incisiveadjective knifelikeadjective lancinateadjective lancinatingadjective niftyadjective not badadjective penetratingadjective penetrativeadjective slap-upadjective stabbingadjective |
| keen adjective similar term | goodadjective intenseadjective perceptiveadjective sharpadjective |
| keen-eyed adjective | sharp-eyedadjective |
| keen-eyed adjective similar term | eyedadjective |
| keen-sighted adjective | argus-eyedadjective eagle-eyedadjective farseeingadjective hawk-eyedadjective longsightedadjective lynx-eyedadjective quick-sightedadjective sharp-eyedadjective sharp-sightedadjective |
| keen-sighted adjective similar term | farsightedadjective presbyopicadjective sightedadjective |
| keenness noun | acuitynoun acutenessnoun aviditynoun avidnessnoun eagernessnoun |
| keenness noun generic term | ardornoun ardournoun elannoun steel trapnoun |