stem: caprice predictable
choice: indifference callous
choice: caution reckless
choice: concern affectionate
choice: friendliness congenial
choice: spontaneity whimsical
prefix: ML: http://www.appliedpractice.com/pdfs/Anal.%20and%20Sent.%20Comp.%20for%20S.%20L.pdf (10) (spell corrected _spontaneity_)