Using all letters

                                                                            coffeehouse

                                                                           coffeehouses

                                                                          The other words:

                                                                               chefs

                                                                               chuff

                                                                              chuffs

                                                                              coffee

                                                                              coffees

                                                                               coffs

                                                                               cuffs

                                                                              effuse

                                                                              effuses

                                                                               feces

                                                                               feoff

                                                                              fescue

                                                                              fescues

                                                                               fesse

                                                                              fesses

                                                                               focus

                                                                              focuses

                                                                             focusses

                                                                               fosse

                                                                              fosses

                                                                               fusee

                                                                              fusees

                                                                               fuses

                                                                              fusses

                                                                               hoofs

                                                                               huffs

                                                                               scoff

                                                                              scoffs

                                                                               scuff

                                                                              scuffs

                                                                              suffuse

                                                                             suffuses