Sneaked, past participle of sneak. Synonyms in the same form.
Pilfer
pilfered, swiped, pinched, lifted, hooked, cabbaged, abstracted, filched, purloined, snarfed, nobbled
Creep
crept, crouched, cringed, moused, groveled, pussyfooted, cowered
Steal
skulked, slinked, lurked, shirked
Other
slipt, tip-toed
All synonyms for sneak →