Let on verb – To take on a false or deceptive appearance. Sing and let on are semantically related. in let the cat out of the bag topic. In some cases you can use "Sing" instead a verb "Let on".
Sing verb – Divulge confidential information or secrets. Let on and sing are semantically related. Sometimes you can use "Let on" instead a verb "Sing". Nearby Words: singing, singer, singe, singed, singable