午后[gogo] afternoon
后宮[koukyuu] harem
后妃[kouhi] queen
皇后[kougou] (Japanese) empress
皇后陛下[kougouheika] her majesty the Empress

皇太后[koutaigou] Queen Mother
天后[tenkou] queen of heaven
母后[bokou] empress dowager
太后[taikou] empress dowager

其の後[sonoato] after that
已後[igo] after this
一死後[isshigo] after one out (in Baseball)
気後れ[kiokure] nervous
紀元後[kigengo] post-era

空前絶後[kuuzenzetsugo] (so marvelous or horrible that it may be) the first and probably the last
兄後[anigo] elder brother
月後れ[tsukiokure] a month or older
午後[gogo] afternoon
午後中[gogojuu] throughout the afternoon