switchboard vs patchboard

switchboard and patchboard both are nouns.

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

As nouns, switchboard and patchboard are synonyms defined as:

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

Other synonyms of switchboard include plugboard.

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