The term "front for" means to camouflage an operation or illicit activity by making it appear as if it's a legal or legitimate business. Synonyms for "front for" include façade, cover-up, guise, mask, camouflage, cloak, pretense, subterfuge, screen, and shield. All these terms express the same meaning of concealing something by creating a false front or disguise. A "façade" refers to something that appears to be one thing but is actually something else. "Camouflage" refers to the use of materials to blend into the environment. "Shield" refers to protection from harm or danger. In conclusion, all these synonyms serve to describe the same concept of disguising a hidden agenda behind a public face.