Is “Niff” a Scrabble word?
Yes
NIFF
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 Niff
noun
1.A bad smell.
“Whew, there's a bit of a niff in here. Is that your socks?”
verb
1.To smell bad; to stink.