S1U1L1P3H4O1N1A1T1E1D2
17 points
SULPHONATED is validvalid
SULPHONATE, to react with sulphuric acid
SULPHONATE, to convert into sulphonic acid, also SULFONATE
SULPHONATE, to react with sulphuric acid
SULPHONATE, to convert into sulphonic acid, also SULFONATE