Here are the synonyms from thesaurus.com:
Main Entry: obliterate
Part of Speech: verb
Synonyms: KO, X-out, annihilate, ax, black out, blot out, blue pencil, bog, cancel, cover, cut, defeat, delete, do in, efface, eliminate, eradicate, erase, expunge, exterminate, extirpate, finish, finish off, kill, knock off, knock out, level*, liquidate, mark out, nix, obscure, off, ravage, root out, rub off, rub out, scratch, scrub, shoot down, sink, smash, squash, take apart, take out*, torpedo, total*, trash*, wash out, waste, wipe off face of earth, wipe out, zap
Many of these do have violent connotations; unless the customer misunderstands the word completely (possible) I would guess it is the violent association they object to. The E synonyms seem best for this context:
efface, eliminate, eradicate, erase, expunge
Edited by maize, 17 October 2017 - 07:51 AM.