Similar words
essence
Close in casual speech — essence is petrol/gasoline; gaz is used colloquially for fuel too.
Similar in other languages
German
Gas
Gas is the German word for the same thing — both mean "gas."
Spanish
gas
gas is the Spanish word for the same thing — both mean "gas."
Portuguese
gás
gás is the Portuguese word for the same thing — both mean "gas."
Practice
1 What does gaz mean?
gas
2 Fill the gap: Ils cuisinent au ___ plutôt qu'à l'électricité.
Full sentence: Ils cuisinent au gaz plutôt qu'à l'électricité. (They cook with gas rather than electricity.)
3 Which fingerprint chart matches gaz?
gaz: neutral register, core frequency, general domain, neutral connotation.