black mass 
noun
A travesty of the Roman Catholic Mass in worship of the Devil.Would the devil worshipers ever perform black masses?...
- So many occult practices emphasize the inversion of the natural order - recall the black mass in which the Catholic mass was chanted backwards.
- He swears we will witness a black mass and some manner of hideous human sacrifice.
- thermocouple
- thermodynamic
- thermodynamical
- thermodynamically
- thermodynamicist
- thermodynamics
- thermo-elastic
- thermoelectric
- thermoelectrically
- thermoelectricity
- thermoformer
- thermoforming
- thermogenesis
- thermogenic
- thermogram
- thermograph
- thermographic
- thermography
- thermohaline circulation
- thermokarst
- thermolabile
- thermoluminescence
- thermoluminescent
- thermolysis
- thermolytic