solarium vs sun lounge

solarium and sun lounge both are nouns.

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

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

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

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

solarium (noun)	sun lounge (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