errant (roving, especially in search of adventure)
eyre (a circuit court held by itinerant royal justices in medieval England)
itinerant (traveling from place to place, especially to perform work or a duty)
itinerary (a route or proposed route of a journey)
itinerate (to travel from place to place)
Definitions are taken from:
The American Heritage® Dictionary of the English Language, Third Edition copyright © 1992 by Houghton Mifflin Company.
Electronic version licensed from InfoSoft International, Inc. All rights reserved.
Webster's Third New International Dictionary, Unabridged. Merriam-Webster, 2002.
http://unabridged.merriam-webster.com (30 Sep. 2006).
English-Word Information: Word Info about English Vocabulary (wordinfo.info).