1. without doubt - Adverb
2. without doubt - Phrase
admittedly
Source: WordNetLife is doubt, and faith without doubt is nothing but death. Miguel de Unamuno
The most successful supporters of tyranny are without doubt those general declaimers who attribute the distresses of the poor, and almost all evils to which society is subject, to human institutions and the iniquity of governments. Thomas Malthus
Freedom of speech and freedom of action are meaningless without freedom to think. And there is no freedom of thought without doubt. Bergen Evans
They were not plagued that night, which Hugi said was without doubt because something worse was being prepared. Holger was inclined to share the dwarf's pessimism. Poul Anderson
If in other sciences we should arrive at certainty without doubt and truth without error, it behooves us to place the foundations of knowledge in mathematics... Roger Bacon
faith without doubt is addiction. Salman Rushdie