General Terms:
* Compound word: This is the most general term, encompassing all words formed by combining two or more other words.
* Blends: This term specifically refers to words formed by combining parts of two other words, like "smog" (from "smoke" and "fog").
* Portmanteau words: This is a more literary term for blends, often used for words that have a humorous or playful connotation.
* Concatenations: This term emphasizes the joining of two or more words, often without a clear distinction between the original words.
Specific Types of Compound Words:
* Closed compound words: These are words where the two parts are written as one word, like "heartbeat" or "eyeglasses."
* Hyphenated compound words: These are words where the two parts are connected by a hyphen, like "well-being" or "mother-in-law."
* Open compound words: These are words where the two parts are written as separate words, like "high school" or "ice cream."
The most appropriate term to use will depend on the specific context and the way the words are combined.