As elsewhere the use of the hyphen depends largely in the familiarity of the phrase; spoilsport, pickpocket.
VI Any two words other than nouns should be treated as a compound, generally solid, when arbitrarily associated as a name; standpoint, outlook.
VII A name or an adjective made by adding a suffix to a proper name compounded of two words should be treated as a compound with a hyphen; East-Indian, New-Yorker. If the name is not inflected this rule does not apply; East India Company, New York man.
VIII Any pair or series of words arbitrarily associated in a joint sense different from their sense when used separately, should be compounded; workman-like, warlike.
COMPONENTS OF COMPOUNDS
Compounds having the force of nouns may be made up in several ways.
1. Two nouns used in other than their natural signification; claw-hammer.
2. A noun and an adjective used in other than their natural signification; great-uncle, dry-goods.
3. A noun and an adverb; touch-down, holder-forth.