Ignis fatuus and Walk-on

Ignis fatuus noun - A pale light sometimes seen at night over marshy ground.

Walk-on and ignis fatuus are semantically related. In some cases you can use "Walk-on" instead a noun phrase "Ignis fatuus".

Walk-on noun - Plays a small part in a dramatic production.

Ignis fatuus and walk-on are semantically related. Sometimes you can use "Ignis fatuus" instead a noun phrase "Walk-on".