1. Propelling.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• propelant,
• -propellant,
• oropellent,
• lropellent,
• -ropellent,
• 0ropellent,
• peopellent,
• pdopellent,
• pfopellent,
• ptopellent,
• p5opellent,
• p4opellent,
• pripellent,
• prkpellent,
• prlpellent,
• prppellent,
• propelent,
• propullent,
• Propulsent,
• Proplent

• propellor,
• propellant,
• propelling,
• propylene,
• propeller,
• prevalent,
• prophyll.

The adjective form of the word "propellent" is "propellant".

The plural of the "propellent" can be the "propellents".

The singular of the "propellent" can be the "propellent".