solarium vs sun porch

solarium and sun porch both are nouns.

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

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

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

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

solarium (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