The Collaborative International Dictionary of English v.0.48:

Gadabout \Gad"a*bout`\, n.
   A gadder [Colloq.]
   [1913 Webster]

WordNet (r) 3.0 (2006):

gadabout
    n 1: a restless seeker after amusement or social companionship

Moby Thesaurus II by Grady Ward, 1.0:

32 Moby Thesaurus words for "gadabout":
   Ahasuerus, Ancient Mariner, Argonaut, Flying Dutchman, Goliard,
   Odysseus, Oisin, Ossian, Ulysses, bird of passage, drifter,
   floater, gad, go-about, itinerant, mover, peregrinator, peregrine,
   peripatetic, rambler, roamer, rolling stone, rover, runabout,
   straggler, stroller, strolling player, troubadour, visitant,
   wanderer, wandering minstrel, wandering scholar