RUBIDIC is a playable word

rubidium Scrabble® Dictionary

noun
pl. rubidiums
a metallic element
(adjective) rubidic
30 Playable Words can be made from "RUBIDIC"
   2-Letter Words (2 found)
   3-Letter Words (15 found)
   4-Letter Words (12 found)
   7-Letter Words (1 found)