Mouth off and Take note

Mouth off verb - To talk as if giving an important and formal speech.

Take note and mouth off are semantically related In some cases you can use "Take note" instead a verb "Mouth off".

Take note verb - Observe with care or pay close attention to.

Mouth off and take note are semantically related in notice and comment topic. Sometimes you can use "Mouth off" instead a verb phrase "Take note".