Quickest and Short-lived

Quickest adverb - Most quickly.

Short-lived and quickest are semantically related. In some cases you can use "Short-lived" instead an adjective "Quickest".

Short-lived adjective - Lasting only for a short time.

Quickest and short-lived are semantically related. Sometimes you can replace term "Quickest" with "Short-lived", this terms are similar.