punched card vs punch card

punched card and punch card both are nouns.

Word	Noun	Adjective	Verb	Adverb
punched card	Yes	No	No	No
punch card	Yes	No	No	No

As nouns, punched card and punch card are synonyms defined as:

punched card and punch card: a card on which data can be recorded in the form of punched holes

Other synonyms of punched card include Hollerith card.

punched card (noun)	punch card (noun)
a card on which data can be recorded in the form of punched holes	a card on which data can be recorded in the form of punched holes