patchboard vs switchboard

patchboard and switchboard both are nouns.

Word	Noun	Adjective	Verb	Adverb
patchboard	Yes	No	No	No
switchboard	Yes	No	No	No

As nouns, patchboard and switchboard are synonyms defined as:

patchboard and switchboard: telephone central where circuits are completed with patchcords

Other synonyms of patchboard include plugboard.

patchboard (noun)	switchboard (noun)
telephone central where circuits are completed with patchcords	telephone central where circuits are completed with patchcords