OK
adequate
all right
alright
cheering
comforting
copacetic
copasetic
copesetic
copesettic
fair to middling
fine
good
hunky-dory
okay
passable
passing
right
satisfying
tolerable
absolute
acceptable
admissible
ample
assuring
atoning
authoritative
barely sufficient
better than nothing
cogent
comfortable
commensurate
compensating
competent
conclusive
convictional
convincing
corresponding
decent
decisive
determinative
due
enough
equal to
fair
fairish
fit
good enough
goodish
impressive
minimal
minimum
moderate
not amiss
not bad
not half bad
not so bad
persuasive
plenty
plenty good enough
presentable
pretty good
proportionable
proportionate
agreeable
favorable
proper
reasonable
reliable
factory
olfactory
refractory
unsatisfactory