Common words:
* Circular: Shaped like a circle.
* Popular: Widely liked or admired.
* Regular: Occurring or done at uniform intervals.
* Singular: Unique or exceptional.
* Molecular: Relating to molecules.
* Spectacular: Impressive or magnificent.
* Vascular: Relating to blood vessels.
* Jocular: Humorous or playful.
Less common words:
* Angular: Having angles.
* Cellular: Relating to cells.
* Conular: Relating to a type of extinct marine animal.
* Fibular: Relating to the fibula bone.
* Granular: Composed of granules.
* Insular: Relating to or characteristic of an island.
* Molecular: Relating to molecules.
* Peninsular: Relating to a peninsula.
* Rectangular: Shaped like a rectangle.
* Sicular: Relating to a sickle.
* Sicular: Relating to a sickle.
* Stellular: Relating to a star.
* Tubular: Shaped like a tube.
Note: The suffix "-ular" is often used to form adjectives, but it can also be used to form nouns. For example, "molecule" is a noun, while "molecular" is an adjective.