Here's how:
Noun:
* Definition: A small, flat, medicated tablet, typically for dissolving in the mouth.
* Example: "She sucked on a lozenge to soothe her sore throat."
Adjective:
* Definition: Shaped like a lozenge (a diamond-shaped figure with four equal sides).
* Example: "The lozenge-shaped window added a unique touch to the building's design."
The part of speech will depend on how it is used in a sentence.