pregnant chad vs chad

pregnant chad and chad both are nouns.

Word	Noun	Adjective	Verb	Adverb
pregnant chad	Yes	No	No	No
chad	Yes	No	No	No

As nouns, chad is a hypernym of pregnant chad; that is, chad is a word with a broader meaning than pregnant chad:

pregnant chad: a chad that has been punched or dimpled but all four corners are still attached
chad: a small piece of paper that is supposed to be removed when a hole is punched in a card or paper tape

pregnant chad (noun)	chad (noun)
a chad that has been punched or dimpled but all four corners are still attached	a small piece of paper that is supposed to be removed when a hole is punched in a card or paper tape