Forsooth (2 Occurrences)

... 2. (vt) To address respectfully with the term forsooth. 3. (n.) A person who used forsooth much; a very ceremonious and deferential person. ... biblethesaurus.org/f/forsooth.htm - 7k

Forswear (1 Occurrence)

biblethesaurus.org/f/forswear.htm - 7k

Forsookest (2 Occurrences)

biblethesaurus.org/f/forsookest.htm - 7k