WordNet sense 1 (a person who tries to please someone in order to gain a personal advantage):

lackey, sycophant, toady

WordNet sense 2 (a person who crawls or creeps along the ground):

creeper

WordNet sense 3 (terrestrial worm that burrows into and helps aerate soil; often surfaces when the ground is cool or wet; used as bait by anglers):

angleworm, earthworm, wiggler, fishworm, nightcrawler, nightwalker, dew worm, fishing worm, red worm