"pirate ships were vagabonds of the sea"

"led a vagabond life"
"a rootless wanderer"

"a drifting double-dealer"
"the floating population"
"vagrant hippies of the sixties"

"The gypsies roamed the woods"
"roving vagabonds"
"the wandering Jew"
"The cattle roam across the prairie"
"the laborers drift from one town to the next"
"They rolled from town to town"