Synonyms of 'seer'
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(in ancient Greece and Rome) any of a number of women believed to be oracles or prophetesses, one of the most famous being the sibyl of Cumae, who guided Aeneas through the underworld
In former times, soothsayers were people who believed they could see into the future and say what was going to happen.
You don't have to be a soothsayer to predict his likely tactics.
Thesaurus for seer from the Collins English Thesaurus
A seer is a person who tells people what will happen in the future.