You mean original "noun1" or rationalized "noun1" ?
Happy to help if you provide me with sample code.
Ball should not be a synonym of twine unless:
- You set it up manually in the vocabulary {} section.
- You used set_sentence to rewrite the sentence.
- You set up a parser preprocessor step (in the vocabulary {} section).
- Twine was somewhere else in the sentence, and the parser became confused (unknown preposition).