Answer:
Culminating, conclusion, declaring, backbone, and significance
Step-by-step explanation:
I researched it a little, one website showed synonyms. I'm not sure if I can fully trust this website. It showed the words culminating, conclusion, declaring, backbone, and significance.
Try explaining to your teacher that you were having a hard time on this. You asked for help and researched what you could, and didn't find much to help you.