you can't run with the hare and hunt with the hounds
conflict
unfertile
ununifiable
nonpermutable
unprogrammable
unsoundable
infertile
sterile
unfragmentable
unsimulable
uneffaceable
unconcretizable
unpairable
nondomesticable
nonundoable
inaddible
unspillable
unduplicatable
refigure
superimprobable
dupe
nonprovable
irrevisable
undisguisable
uncombinable
nonratifiable
approachless
uncreatable
inachievable
nonobtainable
ingenerable
inseparable
unarticulable
noninterchangeable
oil and water
unimplementable
undepletable
unadvisable
unprovable
unmusterable
improvable
inescapable
indefiable