Compound words are made up of two parts of speech. For example, the compound noun handkerchief is made up of two nouns: hand + kerchief. Semantically, compound words are very interesting, since ...

Compound words are formed when two or more separate words are joined together. This creates a brand new word that often has a new meaning. For example: Super and Hero = Superhero Tooth and Brush ...

Hyphenate compound words when they show compound numbers, for example, seventy-six, twenty-five etcetera. Where word combinations might sound awkward, hyphens eliminate that possibility.

Grammar expert and enthusiast June Casagrande dives into the world of hyphens and how to actually use them in writing.

For each set, give a fourth word that can follow to complete compound words or familiar two-word phrases. Example: Chain, Priority, Registered --> MAIL (chain mail, priority mail, registered mail) 1.