demonstrate - show, explain, prove⏎
build - increase, develop, progress, create⏎
customer - buyer, purchaser, client, patron⏎
agent - contractor, operator, dealer, representative, middle-man⏎
document - record, official paper⏎
archive - collection, collect, store, file, documentation⏎
appraise - judge, consider, examine, assess, review⏎
appropriate - save, take, seize, keep⏎
circular - advertisement, publication, notice, letter, leaflet, notice, notification, flyer⏎
change - alter, amend, replace, modulate, make different⏎