<pre>
 abuse-disabuse
 advise-disadvise
 calescent-incalescent
 candescent-incandescent
 claim-disclaim
 color-discolor
 flammable-inflammable
 genius-ingenius
 habited-inhabited
 habitable-inhabitable
 heritable-inheritable
 illusionary-disillusionary
 limit-delimit
 lineate-delineate
 loosen-unloosen
 merge-immerge
 nude-denude
 passive-impassive
 prove-disprove
 ravel-unravel
 rupture-disrupture
 scribe-inscribe
 section-dissection
 sever-dissever
 spoil-despoil
 valuable-invaluable
</pre>
