Electrode and Grid

Electrode noun - A conductor used to make electrical contact with some part of a circuit.

Grid and electrode are semantically related. In some cases you can replace term "Grid" with "Electrode", this nouns are similar.

Grid noun - An electrode placed between the cathode and anode of a vacuum tube to control the flow of electrons through the tube.

Electrode and grid are semantically related. Sometimes you can use "Electrode" instead a noun "Grid".