The List
There are 53 6 letter words with B as the last letter. The highest scoring is HOBJOB at 20 points in Scrabble. 4 carry three or more vowels, which makes them useful for dumping a vowel-clogged rack.
ABSORBADSORBADVERBAPLOMBATHROBBAOBABBEDAUBBEDUMBBENUMBBICARBCHERUBCOBWEBCOMARBCONFABCORYMBDECARBDESORBEARBOBENJAMBENTOMBENWOMBEXCAMBFANSUBGOSSIBHABOOBHOBJOBHOBNOBHUBBUBINTOMBJILBABKINCOBLABLABLIBLABMIDRIBMIHRABMILNEBNUTJOBPREFABRECOMBRESORBREVERBSCARABSCHLUBSCRAMBSERDABSKIBOBSKYLABSTROMBSUBDEBSUBURBSUPERBUNCURBUNTOMB