deep-laid
put-up
deliberation
calculation
calculated
behind-the-scenes
sub-rosa
under-the-table
unconsidered
off-the-record
measured
deliberate
covertly
secretively
planification
advertently
mindfully
heedfully
plot
latently
secretolytically
semi-planned
measure twice and cut once
off the grid
hidelings
unplanned
arrange
premeditated
concealedly
staged
ill-conceived
sub rosa
well-laid
refined
spontaneous
unwritten
planned
ad-lib
predeliberate
premeditation
off the top of one's head
buttoned-up
knock-up
on the hush
prearrangement
considered
studious
surreptitiously
cogitation
pedetentously