Flotation and Rod

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

Rod and flotation are semantically related. in something that holds up structure topic. In some cases you can use "Rod" instead a noun "Flotation".

Rod noun - A heavy rigid stick used as a weapon or for punishment.

Flotation and rod are semantically related. Sometimes you can use "Flotation" instead a noun "Rod".