Is “Ruler” a Scrabble word?
Yes
RULER
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 Ruler
/ˈɹuːlə(ɹ)/
noun
1.A (usually rigid), flat, rectangular measuring or drawing device with graduations in units of measurement; a straightedge with markings.
2.A person who rules or governs; someone or something that exercises dominion or controlling power over others.
Synonyms: rule
verb
1.To beat with a ruler (as a traditional school punishment).