one-half, fractional, uncomplete, incomplete, quarter, dozen, threequarters, ahalf, third, onehalf, more...

whole, entire, complete, full, total

half-baked, half-cocked, half-hearted, half-witted, half-assed, more...

one, first, second, other, latter, lower, upper, last, southern, northern, top

50% of moms,   halfway there,   50/50 share,   two quarters,   one section of two,   one out of two,   50 percent,   one in two,   soccer period,   50% (2 wds)