Crossing and Plug-in

Crossing noun - A journey over water in a vessel.

Plug-in and crossing are semantically related In some cases you can use "Plug-in" instead a noun "Crossing".

Nearby Words: cross, crossed, crossbar, crossover

Plug-in noun - A printed circuit that can be inserted into expansion slots in a computer to increase the computer's capabilities.

Crossing and plug-in are semantically related in link topic. You can use "Crossing" instead a noun phrase "Plug-in", if it concerns topics such as connection.