Answer: moho

AnswerCrossword Clue
MOHOCrust-mantle link
MOHOEarth layer
MOHOHawaiian honey-eating bird.
MOHOPoint below ocean basin.
MOHOGeological discontinuity
MOHOHawaiian bird
MOHOHawaiian honey eater
MOHOPoint deep down in the ocean
MOHOPoint deep under the ocean's floor
MOHOPoint deep under the ocean floor