Choose a word similar to the group: Bright, Shiny, Luminous.

C. RADIANT

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

C. SERENE

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

C. SERENE

Choose a word that is similar to the group: 'ancient, old, archaic'.

C. ANTIQUE

Choose a word similar to the group: Strong, Sturdy, Robust.

C. POWERFUL