THESAURUS
excavate
avulse, bore, bring to light, bring up, burrow, clear, countersink, cut out, deepen, delve, depress, deracinate, dig, dig out, dig up, dike, disclose, disentangle, disinter, dive, draw, draw out, dredge, dredge up, drill, drive, eradicate, evolve, evulse, excise, exhume, expose, exsect, extract, extricate, ferret out, fish up, furrow, get out, gouge, gouge out, groove, grub, grub up, hollow out, lay bare, lower, mine, pick out, pluck out, pluck up, pull, pull out, pull up, quarry, rake out, remove, reveal, rip out, root out, root up, sap, scoop, scoop out, scrabble, scrape, scratch, shovel, sink, spade, take out, tear out, trench, trough, tunnel, turn up, uncover, unearth, unravel, uproot, weed out, withdraw, worm out, wrest out
ROGET THESAURUS
excavate
Concavity
VB
be concave, retire, cave in, render concave, depress, hollow, scoop, scoop out, gouge, gouge out, dig, delve,
excavate, dent, dint, mine, sap, undermine, burrow, tunnel, stave in.