The word "corpulence" means "having a large, bulky body" or "fat". Among the options, the word "bulky" best matches the meaning of "corpulence", which refers to being large or overweight.
- Pliable refers to being flexible or easily bent, which is not related to "corpulence".
- Flourishing means thriving or growing well, which is also unrelated to the idea of "being bulky".
- Affectionate refers to showing fondness or love, which is not a suitable synonym for "corpulence".
Therefore, the correct answer is option (3).