Propane and gasoline are two (5)
I believe the answer is:
fuels
(Other definitions for fuels that I've seen before include "Substances that provide heat or power" , "Substances consumed to produce energy" .)
I've seen this clue in the USA Today.
Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free.
Check out my app
or
learn more
about the Crossword Genius project.