Synonyms for Wiggler (same or very similar meaning)
WordNet sense 1 (one who can't stay still (especially a child)):
wriggler, squirmerWordNet sense 2 (terrestrial worm that burrows into and helps aerate soil; often surfaces when the ground is cool or wet; used as bait by anglers):
angleworm, crawler, earthworm, fishworm, nightcrawler, nightwalker, dew worm, fishing worm, red wormFrom the ODE community, based on WordNetadd/edit