Here's why it's not a synonym or antonym:
* Synonyms are words with similar meanings (e.g., happy/joyful, big/large).
* Antonyms are words with opposite meanings (e.g., hot/cold, up/down).
To find synonyms and antonyms for "luxurious," you need to consider the specific aspect you want to emphasize. For example:
Synonyms:
* Opulent: emphasizes wealth and richness
* Lavish: emphasizes abundance and extravagance
* Splendid: emphasizes grandeur and magnificence
* Elegant: emphasizes refinement and sophistication
Antonyms:
* Simple: emphasizes plainness and lack of extravagance
* Basic: emphasizes essential and unadorned
* Cheap: emphasizes low cost and poor quality
* Spartan: emphasizes austerity and minimalism