Is “Sib” a Scrabble word?
Yes
SIB
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 Sib
/sɪb/
adjective
1.Having kinship or relationship; related by same-bloodedness; having affinity; being akin; kindred.