Observant and Quickest

Observant adjective - Paying close attention usually for the purpose of anticipating approaching danger or opportunity.

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

Nearby Words: observation, observance, observable, observing, observer

Quickest adverb - Most quickly.

Observant and quickest are semantically related. Sometimes you can use "Observant" instead an adjective "Quickest".