Unmanned rhymes with:
command, demand, manned, outmanned, remand, band, banned, bland, bourland, brand, brande, canned, chand, command, deland, demand, disband, expand, fanned, fernand, firsthand, gland, grand, grande, hand, hoiland, laband, land, lande, lefthand, manned, marchand, meadowland, misunderstand, offhand, outmanned, panned, planned, rand, remand, righthand, sand, sande, scanned, shand, spanned, stand, strand, strande, tanned, understand, unplanned, vande, withstand, zand
Unmanned sounds like:
uinta, unaided, unamended, unanimity, unaudited, und, undated, undid, undo, undue, unedited, unheeded, unimate, unimedia, uninitiated, unit, unita, unite, united, unity, unmade, unmet, unnamed, unneeded, unted, untidy, untie, untied, untiedt, unto, unwanted, unwed, unwind, unwound