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Webster 1913 Edition

Noun.

Excess; tumult; revelry.

[Obs.]

His life he led in lawless

riotise

Spenser.

Noun.

Dissoluteness; luxury. [Not in use.]

riotise ‎(uncountable)

(archaic) Wild excess; revelry, riotousness. [from 16th c.]
- 1590, Edmund Spenser, The Faerie Queene, III.1:
  Which stately manner whenas they did see, / The image of superfluous riotize, / Exceeding much the state of meane degree, / They greatly wondred whence so sumptuous guize / Might be maintayned [...].