Yes, ruler is a Scrabble word!

...and is worth 5 points in Scrabble, and 7 points in Words with Friends

ruler

Noun

1. A person who rules or commands

2. Measuring stick consisting of a strip of wood or metal or plastic with a straight edge that is used for drawing straight lines and measuring lengths

What Scrabble words can I make with the letters in ruler?

5 Letter Words

lurer

4 Letter Words

lure
ruer
rule

Search for more Scrabble words

1 Anagram of Ruler

lurer

Words that can be created with an extra letter added to ruler:

C:curlerB:burlerF:furlerI:rulierH:hurlerK:lurkerS:lurersrulers