verandah vs lanai

verandah and lanai both are nouns.

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

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

verandah: a porch along the outside of a building (sometimes partly enclosed)
lanai: a veranda or roofed patio often furnished and used as a living room

verandah (noun)	lanai (noun)
a porch along the outside of a building (sometimes partly enclosed)	a veranda or roofed patio often furnished and used as a living room