sun porch vs sun parlour

sun porch and sun parlour both are nouns.

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

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

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

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

sun porch (noun)	sun parlour (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