HMG 
abbreviation
(In the UK) Her or His Majesty’s Government.
- petrol blue
- petrol bomb
- petrol bomber
- petrol bombing
- petrol bowser
- petrol bunk
- petrol cap
- petrol coupon
- petrol-electric
- petrolene
- petroleous
- petroleum
- petroleum coke
- petroleum ether
- petroleum fly
- petroleum geologist
- petroleum geology
- petroleum jelly
- petroleum oil
- petroleum spirit
- petroleum well
- petroleur
- petroleuse
- petrol gage
- petrol gauge