amphibious operation

NOUN
20 LETTERS · STARTS WITH A

amphibious operation is a valid 20-letter word worth 30 points in Scrabble and 35 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS
A1M3P3H4I1B3I1O1U1S1O1P3E1R1A1T1I1O1N1
1 + 3 + 3 + 4 + 1 + 3 + 1 + 1 + 1 + 1 + 0 + 1 + 3 + 1 + 1 + 1 + 1 + 1 + 1 + 1 =30 PTS
DOUBLE WORD → 60TRIPLE WORD → 90
MEANING

What does amphibious operation mean?

NOUN · 1 SENSE
1

A military operation by both land and sea forces.