sunroom vs sun porch

sunroom and sun porch both are nouns.

Word	Noun	Adjective	Verb	Adverb
sunroom	Yes	No	No	No
sun porch	Yes	No	No	No

As nouns, sunroom and sun porch are synonyms defined as:

sunroom and sun porch: a room enclosed largely with glass and affording exposure to the sun

Other synonyms of sunroom include solarium, sun lounge, sun parlor, sun parlour, sunporch.

sunroom (noun)	sun porch (noun)
a room enclosed largely with glass and affording exposure to the sun	a room enclosed largely with glass and affording exposure to the sun