Using all letters

                                                                            scandinavia

                                                                           scandinavian

                                                                           scandinavians

                                                                          The other words:

                                                                               avian

                                                                              avians

                                                                              canvas

                                                                              canvass

                                                                              casava

                                                                              casavas

                                                                              cassava

                                                                             cassavas

                                                                               civic

                                                                              civics

                                                                               david

                                                                               davis

                                                                               divan

                                                                              divans

                                                                               divas

                                                                              savanna

                                                                             savannas

                                                                             vaccinia

                                                                               vadis

                                                                               viand

                                                                              viands

                                                                               vinas

                                                                               vinca

                                                                              vincas

                                                                               vinic

                                                                               visas

                                                                              viscid

                                                                               vivid