Grammarly
Grammarly Blog: Closed Compound Words
This page explains closed compound words, one word compounds formed by two words, and provides examples.
Get It Write
Get It Write: Compound Words: When to Hyphenate
Learn about the three kinds of compound words, closed compounds, hyphenated compounds, and open compounds. This tutorial offers an easy way to figure out when to hyphenate compound words if you cannot find the compound in the dictionary....