They are synonyms. I feel roomy is a bit more colloquial. We say "Your new apartment looks very roomy". Spacious is a more proper word, especially for written/formal text. "Our office provides a spacious, well-lit work environment".
@jickoon: Hehe, not really, that sounds funny (but cute!). Both words apply to a "space", as in a room, or an area, etc. For a shirt, you'd have to use "loose" or "loose-fitting" or "large" or something like that, depending on context.
The Language Level symbol shows a user's proficiency in the languages they're interested in. Setting your Language Level helps other users provide you with answers that aren't too complex or too simple.
Has difficulty understanding even short answers in this language.
Can ask simple questions and can understand simple answers.
Can ask all types of general questions and can understand longer answers.
Can understand long, complex answers.
This answer was given within 60 minutes of the question being posted.
How do you say "Hello" in Korean? Find out on HiNative!