sul·fon·meth·ane 
(sŭl′fōn-mĕthān′, -fŏn-)
(sŭl′fōn-mĕthān′, -fŏn-)n.
A colorless crystalline or powdered compound, C7H16O4S2, formerly used as a hypnotic.
- counterdemonstrator
- counterespionage
- counterexample
- counterfactual
- counterfeit
- counterfeiter
- counterfoil
- counterforce
- counterglow
- counterinsurgency
- counterinsurgent
- counterintelligence
- counterintuition
- counterintuitive
- counterintuitively
- counterirritant
- counterirritation
- counterman
- countermand
- countermarch
- countermeasure
- countermine
- countermove
- countermovement
- counteroffensive