perimeter, border, edge, gross profit, security deposit, allowance, leeway, tolerance, gross profit margin, marginal, more...

center, core, middle, heart, nucleus

top margin, bottom margin, left margin, right margin, gutter margin, more...

posterior, anterior, left, wider, narrow, lower, outer, upper, inner, lateral, right

edge of book,   latin for "edge",   edge or boundary,   book edge,   profit pct.,   side of book,   edge or border,   lee way,   edge or rim,   narrow lead