bidder / bitter [ˈbɪdɜr]
bidder – n. – one who offers to do work or pay a set price; 2. someone who invites or utters a greeting
bitter – adj. – 1. having a sharp, pungent taste; not sweet; 2. caused by or showing mental pain or resentment; painful or difficult to accept; 3. harsh, virulent; piercingly cold; n. – 1. (in pl.) liquor with a bitter flavour (esp. of wormwood), used as an additive in cocktails; 2. Brit. – beer strongly flavoured with hops having a bitter taste