Cannula and Subway

Cannula noun - A small flexible tube inserted into a body cavity for draining off fluid or introducing medication.

Subway and cannula are semantically related. in hose topic. In some cases you can use "Subway" instead a noun "Cannula".

Subway noun - An electric railway operating below the surface of the ground (usually in a city).

Cannula and subway are semantically related. You can use "Cannula" instead a noun "Subway".