Indubitably synonyms

He was indubitably the most extraordinary of all the Catherinian favourites.

The absence of suffering, the satisfaction of one's needs and consequent freedom in the choice of one's occupation, that is, of one's way of life, now seemed to Pierre to be indubitably man's highest happiness.

After his cousin Gustavus Adolphus, whom in many respects he strikingly resembled, he was indubitably the most amiable and brilliant of all the princes of the House of Vasa.

The hostilities were later renewed; in 1302 Boniface himself drafted and published the indubitably genuine bull Unam sanctam, one of the strongest official statements of the papal prerogative ever made.

Peripatus, though indubitably an Arthropod, differs in such important respects from all the old-established Arthropod classes, that a special class, equivalent in rank to the others, and called Prototracheata or Onychophora, has had, as we have seen, to be created for its sole occupancy.