betrayer, n. traitor, [seducer]; [Judas].
betroth, v. affiance.
betrothal, n. affiance, betrothment.
better, n. upper [hand], [domination], [advantage], [control], [superiority]; [improvement].
better, v. ameliorate, [improve], emend, [promote], [reform], meliorate, amend.
betterment, n. amelioration, [improvement], [promotion], amendment, [reformation].
between, prep. betwixt (Obsolescent).--a. interjacent, [intervening].
betwixt and between. (Colloq.) [so-so], [mediocre], [average], [ordinary], [indifferent].
bevy, n. (of birds) [flock], covey; (of deer) [herd]; (of girls) [group].