The word "disguiser" is often used to describe a person who conceals their true identity or appearance for various reasons. However, there are many other words that can be used to convey a similar meaning. One alternative is "camouflager", which implies blending in with the surroundings. Another option is "impersonator", which suggests mimicking another person's appearance or demeanor. "Mimic" or "imitator" are also good choices. "Chameleon" describes someone adapting to their surroundings or role very easily. Finally, "deceiver" is a powerful word, implying someone who intentionally misleads others for personal gain. These synonyms provide a range of vocabulary options to describe someone who is hiding or altering their true identity.