High-five and Howdy

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

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

Howdy noun - An expression of greeting.

High-five and howdy are semantically related. Sometimes you can replace phrase "High-five" with "Howdy", this terms are similar.