porch vs verandah

porch and verandah both are nouns.

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

As nouns, verandah is a hyponym of porch; that is, verandah is a word with a more specific, narrower meaning than porch:

porch: a structure attached to the exterior of a building often forming a covered entrance
verandah: a porch along the outside of a building (sometimes partly enclosed)

Other hyponyms of porch include back porch, deck, front porch, portico, stoep, stoop, gallery, veranda.

porch (noun)	verandah (noun)
a structure attached to the exterior of a building often forming a covered entrance	a porch along the outside of a building (sometimes partly enclosed)