Is “Sibs” a Scrabble word?
Yes
SIBS
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 Sibs
noun
1.Kindred; kin; kinsmen; a body of persons related by blood in any degree.
2.A kinsman; a blood relation; a relative, near or remote; one closely allied to another; an intimate companion.
3.A sibling, brother or sister (irrespective of gender)