Using all letters

                                                                           entrenchment

                                                                           retrenchment

                                                                            trenchermen

                                                                          The other words:

                                                                               cheer

                                                                              cheerer

                                                                               chert

                                                                              creche

                                                                             entrench

                                                                              etcher

                                                                              ethene

                                                                               ether

                                                                              hemmer

                                                                               hence

                                                                             henchmen

                                                                              menthe

                                                                              nether

                                                                             recherche

                                                                               rehem

                                                                               retch

                                                                             retrench

                                                                               teeth

                                                                              teethe

                                                                              teether

                                                                               tench

                                                                               tenth

                                                                              tether

                                                                               theme

                                                                              thence

                                                                               there

                                                                               therm

                                                                               three

                                                                              trench

                                                                             trencher