great comfort, especially as provided by expensive and beautiful things. / Something expensive that is pleasant to have but is not necessary. / Something that gives you a lot of pleasure but cannot be done often.
LUXURY (N) - LUXURIOUS (A) - LUXURIATE (V)
power that is used to provide heat, operate machines etc.
ENERGY (N) - TO ENERGIZE (V) - ENERGETIC (A) - ENERGETICALLY (ADV)
a hard black mineral which is dug out of the ground and burnt to produce heat