* Adjective: It describes a noun. For example, "historic" describes something related to history, and "plastic" describes something made of plastic.
* Relating to: It signifies a connection or relationship to something else. For example, "scientific" means relating to science, and "economic" means relating to the economy.
Here are some examples:
* Historic: related to history
* Democratic: relating to democracy
* Fantastic: very good or impressive
* Organic: relating to or derived from living organisms
* Graphic: relating to visual art or design
* Geographic: relating to geography
* Romantic: relating to love or romance
However, it's important to remember that not every word ending in "-ic" follows these rules. Sometimes, "-ic" is part of the root word itself, like in "music" or "clinic".