countersink Synonyms

counterbore set countersink bit conical drill punch pierce lower implement impale gimlet fix drill dive reamer recess counter bores counter bore sets coiffe trephine trepan spit setting riveter riddle dig determine bur broach borer bite bit bevel bore awl auger arrange burr coif coiffure depression depress define deepen decrease cutting countersinking countersunk corkscrew congeal