grid vs thermionic valve

grid and thermionic valve both are nouns.

Word	Noun	Adjective	Verb	Adverb
grid	Yes	No	No	No
thermionic valve	Yes	No	No	No

grid (noun)	thermionic valve (noun)
a cooking utensil of parallel metal bars; used to grill fish or meat	electronic device consisting of a system of electrodes arranged in an evacuated glass or metal envelope
an electrode placed between the cathode and anode of a vacuum tube to control the flow of electrons through the tube
a system of high tension cables by which electrical power is distributed throughout a region
a perforated or corrugated metal plate used in a storage battery as a conductor and support for the active material
a pattern of regularly spaced horizontal and vertical lines