Using all letters

                                                                           multimillion

                                                                          The other words:

                                                                               ilium

                                                                               limit

                                                                               linum

                                                                              lotion

                                                                               lotto

                                                                              million

                                                                              milton

                                                                               molto

                                                                              moonlit

                                                                              moulin

                                                                               moult

                                                                              mullion

                                                                               multi

                                                                               multo

                                                                               nullo

                                                                              toluol

                                                                              tumult

                                                                              ultimo

                                                                               unlit

                                                                               until