Ahem and Flare up

Ahem noun - The utterance of a sound similar to clearing the throat; intended to get attention, express hesitancy, fill a pause, hide embarrassment, warn a friend, etc..

Flare up and ahem are semantically related. In some cases you can use "Flare up" instead a noun "Ahem".

Flare up verb - To become very angry.

Ahem and flare up are semantically related. Sometimes you can use "Ahem" instead a noun "Flare up".