* Bound morpheme: This is the broader term. It refers to any morpheme that cannot stand alone as a word. This includes suffixes, prefixes, and infixes.
* Suffix: This is a specific type of bound morpheme that is added to the end of a word.
Here's an example:
* "Unbelievable": This word has the bound morpheme "un-" which is a prefix.
* "Happily": This word has the bound morpheme "-ly" which is a suffix.
So, all suffixes are bound morphemes, but not all bound morphemes are suffixes.