What is another word for "probe"?

Roget's Thesaurus (1911) lists these synonyms for "probe": abysmal, and, ankle, auger, awl, bathometer, bathymetry, benthal, beyond, bodkin, borer, bottomless, cast, chisel, concavity, corkscrew, crater, deep, deepen, deepness, depression, depth, dibble, dig, draught, drill, earth, excavate, fathom, fathomless, gimlet, gouge, gulf, head, heave, hell, hollow, instrument, knee, lancet.