Second edition

§ 29. Classification

Compound words may be described from different points of view and consequently may be classified according to different principles. They may be viewed from the point of view: 1) of general relationship and degree of semantic independence of components; 2) of the parts of speech compound words represent; 3) of the means of composition used to link the two ICs together; 4) of the type of ICs that are brought together to form a compound; 5) of the correlative relations with the system of free word-groups.
Each type of compound words based on the above-mentioned principles should also be described from the point of view of the degree of its potential power, i.e. its productivity, its relevancy to the system of Modern English compounds. This description must aim at finding and setting a system of ordered structural and semantic rules for productive types of compound words on analogy with which an infinite number of new compounds constantly appear in the language.

§ 30. Relations between the ICs of Compounds

From the point of view of degree of semantic independence there are two types of relationship between the ICs of compound words that are generally recognised in linguistic literature: the relations of coordination and subordination, and accordingly compound words fall into two classes: coordinative compounds (often termed copulative or additive) and subordinative (often termed determinative).
In coordinative compounds the two ICs are semantically equally important as in fighter-bomber oak-tree, girl-friend, Anglo-American. The constituent bases belong to the same class and most often to the same semantic group. Coordinative compounds make up a comparatively small group of words. Coordinative compounds fall into three groups:

1. 
   Reduplicative compounds which are made up by the repetition of the same base as in goody-goody, fifty-fifty, hush-hush, pooh- pooh. They are all only partially motivated.
   
2. 
   Compounds formed by joining the phonically variated rhythmic twin forms which either alliterate with the same initial consonant but vary the vowels as in chit-chat, zig-zag, sing-song, or rhyme by varying the initial consonants as in clap-trap, a walkle-
   

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