What kind of word is made from parts other word?

The kind of word made from parts of other words is called a compound word.

Here are some examples:

* Sunlight: sun + light

* Keyboard: key + board

* Waterproof: water + proof

* Blueberry: blue + berry

* Firefly: fire + fly

Compound words can be written as one word (e.g., sunlight), two words (e.g., fire fly), or hyphenated (e.g., water-proof).