write__________rewrite
--
healthy__________unhealthy
--
lock__________unlock
--
build__________rebuild
--
color__________bicolor
--
cycle_________bicycle
--
fair_________unfair
--
cycle__________recycle
--
sure__________unsure
--
like__________dislike
--
spell__________misspell
--
buckle__________unbuckle
--
safe__________unsafe
--
view__________preview
--
pay__________prepay
--
heat__________reheat
--
tie__________retie
--
fill__________refill
--
honest__________dishonest
--
friendly_________unfriendly
--