Keen and Quickest

Keen adjective - Able to sense slight impressions or differences.

Quickest and keen are semantically related In some cases you can replace term "Quickest" with "Keen", this adjectives are similar.

Nearby Words: keenness, keenly

Quickest adverb - Most quickly.

Keen and quickest are semantically related in fast topic. Sometimes you can use "Keen" instead an adjective "Quickest", if it concerns topics such as smart.