octennial

Adj

Occurring every eight years.
Lasting or taking eight years.

Origin / Etymology

From oct- + -ennial.

Scrabble Score: 11

octennial: valid Scrabble (US) TWL Word
octennial: not valid in Scrabble (MW) Merriam-Webster Dictionary
octennial: valid Scrabble Word in International Collins CSW Dictionary

Words With Friends Score: 15

octennial: valid Words With Friends Word