9-Letter Words Containing: H,I,O,R

• A prayerbook for a Jewish holiday.

• surgical procedure in which spinal nerve roots are cut; done (anterior roots) to relieve intractable pain or (posterior roots) to stop severe muscle spasms

• one thousand periods per second

• the type genus of Rhizobiaceae; usually occur in the root nodules of legumes; can fix atmospheric oxygen

• a compound of an oxide with water

• a chemical compound containing the hydroxyl group

• hazard to humans or the environment resulting from biological agents or conditions

• any bacterium or virus or toxin that could be used in biological warfare