
Here are two more rules, with examples, covering some words you may have wondered about:
A number of adjective-noun combinations (such as real estate or social security) and noun-noun combinations (such as life insurance or money market) are actually well-established compound nouns serving as adjectives. Unlike short-term, low-risk, red-carpet, and part-time, these expressions refer to well-known concepts or institutions. Because they are easily grasped as a unit, they do not require a hyphen.
- accounts payable records
- branch office reports
- income tax return
- life insurance policy
- public relations adviser
- word processing center
- nuclear energy plant
- social security tax
- exception: a mail-order business
When a compound adjective consists of a noun plus an adjective, hyphenate this combination whether it appears before or after the noun.
- top-heavy
- tone-deaf
- paper-thin
- tax-exempt
- color-blind
- scot-free
- Your suggestion is ingenious but not cost-effective.
- I want a computer that is Windows-compatible.
Some words commonly thought to be hyphenated are in fact not. For example, harebrained, dodgeball, wickerwork, and brainchild are each one word.