Common Words:
* Pentagon: A five-sided polygon.
* Pentameter: A line of verse consisting of five metrical feet.
* Pentathlon: An athletic contest consisting of five events.
* Penthouse: An apartment or suite on the top floor of a building.
* Pentomino: A plane geometric figure formed by connecting five squares edge to edge.
Less Common Words:
* Pentecost: A Christian festival celebrated seven weeks after Easter.
* Pentabrach: A five-branched structure, especially a plant stem.
* Pentadactyl: Having five fingers or toes.
* Pentad: A group of five.
* Pentadactyly: The condition of having five fingers or toes.
* Pentacle: A five-pointed star used in magical rituals.
Scientific Terms:
* Pentane: A colorless, flammable liquid hydrocarbon.
* Pentose: A five-carbon sugar.
* Pentoxide: A compound containing five oxygen atoms.
* Pentobarbital: A barbiturate drug used as a sedative.
* Pentameric: Consisting of five subunits.
Other:
* Pent-up: Suppressed or restrained.
This is not an exhaustive list, but it gives you a good starting point. The prefix "pent" typically indicates the number five.