deck vs porch

deck and porch both are nouns.

Word	Noun	Adjective	Verb	Adverb
deck	Yes	No	Yes	No
porch	Yes	No	No	No

As nouns, porch is a hypernym of deck; that is, porch is a word with a broader meaning than deck:

deck: a porch that resembles the deck on a ship
porch: a structure attached to the exterior of a building often forming a covered entrance

deck (noun)	porch (noun)
any of various platforms built into a vessel	a structure attached to the exterior of a building often forming a covered entrance
street name for a packet of illegal drugs
a porch that resembles the deck on a ship
a pack of 52 playing cards