Use a hyphen to join two words that work together as one modifier before a noun
Use a hyphen in compound numbers from twenty-one to ninety-nine
Use a hyphen in fractions used as adjectives
Use a hyphen with prefixes when needed for clarity or to avoid confusion
Use a hyphen to avoid awkward letter combinations or repeated vowels
Use a hyphen in certain compound nouns and adjectives
Use a hyphen with some spelled-out ages and measurements used as adjectives
Use a hyphen in line breaks when a word is split at the end of a line
