Close out and Stop up

Close out verb - To bring (an event) to a natural or appropriate stopping point.

Stop up and close out are semantically related In some cases you can use "Stop up" instead a verb "Close out".

Stop up verb - To prevent passage through by filling with something.

Close out and stop up are semantically related in block topic. Sometimes you can use "Close out" instead a verb "Stop up", if it concerns topics such as obstruct.