This exercise is designed to test and expand your knowledge of intermediate English vocabulary, which is essential for general fluency and academic success. For each of the 12 words listed below, provide one suitable synonym (a word with a similar meaning) and one suitable antonym (a word with the opposite meaning).

Word Synonym (Similar Meaning) Antonym (Opposite Meaning)
1. Crucial
2. Adequate
3. Vulnerable
4. Incorporate
5. Substantial
6. Plausible
7. Diligent
8. Ambiguous
9. Fluctuate
10. Compensate
11. Disparity
12. Mitigate