Fugacious and Overnight

Fugacious adjective - Lasting only for a short time.

Overnight and fugacious are semantically related In some cases you can use "Overnight" instead an adjective "Fugacious".

Overnight adjective - Lasting, open, or operating through the whole night.

Fugacious and overnight are semantically related in temporary topic. Sometimes you can use "Fugacious" instead an adjective "Overnight", if it concerns topics such as lasting only a short while.