Answer:

rafting

Answer	Crossword Clue
RAFTING	White-water fun
RAFTING	Summer adventure
RAFTING	Grand Canyon activity

RAFTING	Huck Finn's outdoor sport.
RAFTING	Sport involving paddles
RAFTING	Traveling like Heyerdahl
RAFTING	Whitewater doing

Crossword

a puzzle consisting of a grid of squares and blanks into which words crossing vertically and horizontally are written according to clues.