Common words:
* Molecule: A group of atoms bonded together.
* Thistle: A prickly, flowering plant.
* Article: A written piece in a newspaper or magazine.
* Muscle: A band of tissue that can contract.
* Nucleus: The central part of an atom or cell.
Less common words:
* Aculeus: A sharp, pointed structure, often used to describe the stinger of some insects.
* Canule: A small tube, often used for medical purposes.
* Epicule: The outermost layer of the skin.
* Granule: A small particle.
* Immature: Not fully developed.
* Manicule: A small hand, sometimes used figuratively.
* Spectacle: A public show or display.
Technical terms:
* Aculeolate: Having a pointed or prickly structure.
* Articule: A small joint.
* Capitule: A small head or knob.
* Circule: A small circle or ring.
* Folicule: A small sac or pouch.
* Granule: A small particle.
* Plicule: A small fold.
* Reticule: A small net or mesh.
* Stipule: A small leaf-like structure at the base of a leaf.
Figurative words:
* Trifle: A small matter.
* Nickle: A small amount of money.
* Trickle: A small stream of liquid.
This is not an exhaustive list, but it gives you a good starting point.