Cornerstone and Flotation

Cornerstone noun - An immaterial thing upon which something else rests.

Flotation and cornerstone are semantically related In some cases you can use "Flotation" instead a noun "Cornerstone".

Flotation noun - The phenomenon of floating (remaining on the surface of a liquid without sinking).

Cornerstone and flotation are semantically related in something that holds up structure topic. Sometimes you can use "Cornerstone" instead a noun "Flotation".