Hello and High-five

Hello noun - An expression of goodwill upon meeting.

High-five and hello are semantically related. In some cases you can replace phrase "High-five" with "Hello", this terms are similar.

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

Hello and high-five are semantically related. Sometimes you can use "Hello" instead a noun phrase "High-five".