Strong, Sturdy, Robust

C. POWERFUL

Choose a word similar to the group: Fast, Quick, Rapid.

B. SWIFT

Choose a word similar to the group: Calm, Peaceful, Tranquil.

B. SERENE

Choose a word similar to the group: Calm, Peaceful, Tranquil.

C. SERENE

Choose a word similar to the group: 'fast', 'quick', 'swift'.

B. RAPID