luxuriant, luxurious, luxury, deluxe, de luxe, luxe

Luxuriant refers to abundant growth.

• The lagoon was surrounded by luxuriant vegetation.

Luxurious concerns luxury, that which is costly or of high quality.

• The CEO’s office was full of luxurious furniture.

Luxury is properly a noun; however, it is now used as an adjective, especially in advertising.

• Sleeping in on the weekend is a luxury for many parents.
• When my father was a child, a car was viewed as a luxury item.

Though some authors frown on the use of deluxe (sometimes spelled de luxe), it is a long–accepted adjective meaning “elegant and costly.”

• This is our deluxe model: it does cost slightly more than the standard condominium unit.

Luxe—sometimes seen in advertising—is informal and can be replaced by such terms as elegant, opulent, sumptuous or expensive, depending on the context.

• Allesandra is a model and wears nothing but luxe fashions.