addCompoundCatSenses is derived from
lisp make-forms-for-compound in the "compound" case;
make-forms-for-compound (word1 word2 cat connector)
constructs a forms list for the cat senses of a compound
word by copying information from the cat senses of word2
and compounding word1 with the root form of word2 using
the specified connector (if specified).
derived from lisp make-forms-for-compound in suffix case;
and from compound-with-suffix (lex cat false-root kill suffix relation)
compound-with-suffix (lex cat false-root kill suffix relation)
makes a lexical entry for lex using the information on the
'compound-of property of false-root and adding the indicated suffix.