One who commutes (etymology 1).
To and from work and home.
Using public transport.
Normally a short form of commuter rail, commuter train or commuter bus; A transport system or a vehicle in such systems used to transport commuters (#2)
One who wanders, who travels aimlessly.
Any of various far-migrating nymphalid butterflies of the genus Danaus.
The wandering albatross, Diomedea exulans.