High-five and Harbinger

High-five noun - A gesture of greeting or elation; one person's upraised palm slaps the upraised palm of another person.

Harbinger and high-five are semantically related. In some cases you can use "Harbinger" instead a verb phrase "High-five".

Harbinger verb - To give a slight indication of beforehand.

High-five and harbinger are semantically related. Sometimes you can use "High-five" instead a verb "Harbinger".