Here's what rhymes with trifluoride.

Consider these alternatives

trichloride / chloride pyridine / line chlorobenzene / seen tetrachloride / chloride trioxide / dioxide scandium / champion ethylenediamine / nine pentachloride / chloride hypochlorite / right perchloric / historic tetrafluoride / fluoride actinium / scleractinian antimony / testimony hydroxyzine / seen ferricyanide / side persulfate / sulfate papaverine / seen uranyl / will trifluoroacetic / magnetic yttrium / equilibrium