WordNet sense 1 (the boundary line or the area immediately inside the boundary):

border, perimeter

WordNet sense 2 ((finance) the net sales minus the cost of goods and services sold):

gross profit, gross profit margin

WordNet sense 3 (the amount of collateral a customer deposits with a broker when borrowing from the broker to buy securities):

security deposit

WordNet sense 4 (a permissible difference; allowing some freedom to move within limits):

allowance, leeway, tolerance

WordNet sense 5 (a strip near the boundary of an object):

edge