mind-reader, story-teller, fool-killer, office-holder, well-wisher, property-owner; hero-worship, child-study; wood-turning, day-modeling.
Exceptions are such common and brief compounds as —
lawgiver, taxpayer, proofreader, bookkeeper, stockholder.
185. A present participle united (1) with a noun to form a new noun with a meaning different from that which would be conveyed by the two words taken separately, (2) with a preposition used absolutely (i.e., not governing a following noun), to form a noun, should have a hyphen: boarding-house, dining-hall, sleeping-room, dwelling-place, printing-office, walking-stick, starting-point, stepping-stone, stumbling-block, working-man; the putting-in or taking-out of a hyphen.
186. As a general rule, compounds of "book," "house," "mill," "room," "shop," and "work" should be printed as one compact word, without a hyphen, when the prefixed noun contains only one syllable, should be hyphenated when it contains two, and should be printed as two separate words when it contains three or more:
handbook, schoolbook, notebook, textbook; pocket-book, story-book; reference book.
boathouse, clubhouse, schoolhouse, storehouse; engine-house, power-house; business house.
cornmill, handmill, sawmill, windmill; water-mill, paper-mill; chocolate mill.
