burden

consignment

boatload, carload, shipload, trainload, truckload, wagonload

ballast, deadweight

overload, surcharge

bale, bundle, pack, package, packet, parcel, shipment

manifest

body, bulk, mass

oath, pledge, promise, vow, word

arrangement, prearrangement, setup

compact, contract, covenant, pact, trust

debt, payment, tribute

compulsion, constraint, restraint

must, requirement

coercion, duress, force

appointment, engagement, reservation

burden, onus

clog, clutter, fill, pack

heap, mound, pile, stack

press, weigh

strain, tax

overburden, overload, overtax, surcharge

hamper, handicap

afflict, oppress

ail, distress, trouble

afflict, torment, torture

daunt, demoralize, discourage, dishearten, dismay, dispirit, unnerve

agitate, bother, concern, discomfort, discompose, disquiet, disturb, freak (out), perturb, undo, unhinge, unsettle, upset, worry