octennium is a valid English word

Scrabble validity: invalid ( international - Sowpods, US - Twl06 )
iScramble validity: invalid
QuickWords validity: invalid

Meanings

Noun (COUNTABLE)

(rare) An eight-year period.
• Coordinate terms: annum, biennium, triennium, quadrennium, quinquennium, sexennium, septennium, novennium, decennium, centennium, quincentennium, millennium, decamillennium, centimillennium, millionennium

octennium is not a Scrabble valid word

o1c3t1e1n1n1i1u1m3

• International English (Sowpods) - The word is not valid in Scrabble ✘
• US English (TWL06) - The word is not valid in Scrabble ✘
• 13 points

octennium is not an iScramble, QuickWords valid word

o1c2t3e4n5n6i7u8m9

• The word is not valid in iScramble ✘
• The word is not valid in QuickWords ✘
• 45 points

Same letters words (Anagrams)

• EMUNCTION

Same letters plus one

• EMUNCTIONS
• OCTENNIUMS
• OMNILUCENT

Same letters minus one

• CONTINUE
• NOCTUINE
• NOCUMENT
• UNNOTICE