Ornamental, Decorative Knob
This page is the CodyCross answer for the clue below from Water Park, Group 748, Puzzle 5 (Rapids and Waterfalls).
Question is: Ornamental, Decorative Knob
and the answer is: FINIAL
Word Meaning:
FINIAL — (architecture) Especially in Gothic architecture: an ornament, often in the form of a bunch or knot of foliage, on the peak of the gable of a roof, a pediment, a pinnacle, etc.
Definitions from Wiktionary.