ROGET THESAURUS
overweigh
Superiority
VB
be superior, exceed, excel, transcend, outdo, outbalance, outweigh, outrank, outrival, out-Herod, pass, surpass, get ahead of, over-top, override, overpass, overbalance,
overweigh, overmatch, top, o'ertop, cap, beat, cut out, beat hollow, outstrip, eclipse, throw into the shade, take the shine out of, outshine, put one's nose out of joint, have the upper hand, have the whip hand of, have the advantage, turn the scale, kick the beam, play first fiddle, preponderate, predominate, prevail, precede, take precedence, come first, come to a head, culminate, beat all others, bear the palm, break the record, take the cake, become larger, render larger.
Overestimation
VB
overestimate, overrate, overvalue, overprize,
overweigh, overreckon, overstrain, overpraise, eulogize, estimate too highly, attach too much importance to, make mountains of molehills, catch at straws, strain, magnify, exaggerate, set too high a value upon, think much of, make much of, think too much of, make too much of, outreckon, panegyrize, extol, extol to the skies, make the most of, make the best of, make the worst of, make two bites of a cherry, have too high an opinion of oneself.