You searched for: “dissimulator”
dissimulator (s) (noun), dissimulators (pl)
A person who professes beliefs and opinions that he, or she, does not have in order to conceal real feelings or motives; a hypocrite, a phony, or a pretender.
This entry is located in the following units: -or; -our (primarily British) (page 5) simal-, simil-, simul-, -semble (page 2)