Cover up verb – To keep from being publicly known. Withhold and cover up are semantically related. in restrain topic. In some cases you can use "Withhold" instead a verb "Cover up", when it comes to topics like hide.
Withhold verb – To be unwilling to grant. Cover up and withhold are semantically related. Sometimes you can use "Cover up" instead a verb "Withhold". Nearby Word: withholding