The Collaborative International Dictionary of English v.0.48:
Worser \Wors"er\, a.
Thou dost deserve a worser end. --Beau. & Fl.
From worser thoughts which make me do amiss. --Bunyan.
A dreadful quiet felt, and, worser far
Than arms, a sullen interval of war. --Dryden.
Note: This old and redundant form of the comparative occurs
occasionally in the best authors, although commonly
accounted a vulgarism. It has, at least, the analogy of
lesser to sanction its issue. See Lesser. "The
experience of man's worser nature, which intercourse
with ill-chosen associates, by choice or circumstance,
peculiarly teaches." --Hallam.