Is “Kingdom” a Scrabble word?
Yes
KINGDOM
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 Kingdom
/ˈkɪŋdəm/
noun
1.A realm having a king and/or queen as its actual or nominal sovereign.
2.A realm, region, or conceptual space where something is dominant.
“the kingdom of the dead”
3.A rank in the classification of organisms, below domain and above phylum; a taxon at that rank (e.g. the plant kingdom, the animal kingdom).
Synonyms: regnum