make_plural_noun(noun) function when reading verb dictionary

[JingL1014]

Right now the code will not create the plural for multi-word synset nouns, such as "WRITTEN_AGREEMENT" and "DIFFERENCE_OF_OPINION_". For the second example, i know that we do not want to create plural because of the "_" at the end of the string. But should we create plural for the first example?

[johnb30]

@philip-schrodt any thoughts?