• conceal the truth; hide from view, hide from knowledge
• disguise, shield, cover for, blur; hide, conceal; cover something completely
• act of assisting a wrongdoer to hide what he has done; act of covering over or covering up; loose article of clothing that is often worn over a bathing suit; skin-colored makeup that is applied to cover up a blemish (especially on the face)
• a cover-up is an attempt to hide a crime or mistake.
cover up for
• shelter, protect