customer - buyer, purchaser, client, patron⏎
confidential - private, secret, off the record⏎
compulsory - obligatory, binding, incumbent, mandatory⏎
deficiency - lack, shortfall, defect, insufficiency⏎
branded - labelled, well-known, named, patented, labeled⏎
doable - achievable, possible, can be done, viable, practical, practicable, feasible⏎
counterfeit - fake, forgery⏎
degrade - worsen, impair, disrespect⏎
advise - inform, help, tell, post, brief, notify, counsel, instruct⏎
coupon - voucher⏎