Is “Tuber” a Scrabble word?
Yes
TUBER
Valid in at least one Scrabble dictionary
Valid in these dictionaries
SOWPODS / CSW
Scrabble UK & International
TWL / NWL
Scrabble North America
Large English Dictionary
General English word list
Meaning of Tuber
/tjuːbə(ɹ)/
noun
1.A fleshy, thickened underground stem of a plant, usually containing stored starch, for example a potato or arrowroot.
2.A thickened rootstock.
3.A rounded, protuberant structure in a human or animal body.