classroom, lecture-room, recitation room.
tinshop, tailor-shop, carpenter shop.
woodwork, metal-work, filigree work.
Unusual combinations such as source-book and wheat-mill are sometimes hyphenated, and the hyphen is sometimes omitted for the sake of the appearance as in school work.
5. Compounds of maker, dealer, and other words denoting occupation are generally hyphenated; harness-maker, job-printer.
The tendency is to print these words solid when they come into very common use; dressmaker.
6. Hyphenate nouns when combined in an adjectival sense before the name of the same person; the martyr-president Lincoln, the poet-artist Rosetti.
7. Compounds of store are generally hyphenated when the prefix contains one syllable, otherwise not; drug-store, fruit-store (but bookstore), provision store.
8. Compounds of fellow are hyphenated; fellow-being, play-fellow, but bedfellow.
9. Compounds of father, mother, brother, sister, daughter, parent, and foster should be hyphenated when the word in question forms the first part of the compound; father-love, mother-country, brother-officer, sister-state, daughter-cell, parent-word, foster-brother, but (by exception) fatherland.