persevering
perseveringly
perseverantly
nonperseverance
perseverativeness
perseveration
perseverating
dogged
untiring
tireless
hardworking
industrious
transiliency
perseverative
perdurance
pegging
perdurability
sticktoitiveness
strongheartedness
perpetude
perseveratively
endurableness
if at first you don't succeed
suasiveness
unflinching
onward
if at first you don't succeed, try try again
ident
persuadableness
sedulity
unbreakable
inveteracy
wayfaring
perseverator
loyal
propendency
intensive
stronghearted
until hell freezes over
cogent
weighty
telling
endurability
live
persistingly
doggedness
strongheartedly
leg
persistently
American Dream