This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

n. An area on a ship's deck or on the roof of a house used for sunbathing.

"No self-respecting upscale São Paulo residential building omits from its glossy prospectus, featuring lap pool, sundeck, gym, and fully equipped gourmet kitchen, the sala de relax, or “relaxation room.”"

adamantite    trolley car    sci-deck    seven-sided    photon-torpedo