tough
rugged
testingly
arduous
strenuous
straining
failing
flunk
preliminary exam
crane game
prelim
preliminary examination
rigour
posttest
trial by fire
tall
time test
formidability
accommodateness
pons asinorum
toughness
patient of
POST
put the pedal to the metal
backbreaker
tolerant
bleep test
second gear
exercisable
effortless
stay
ultraslow
heckle
ride out
outride
superchallenge
Nintendo hard
downclimb
put through its paces
casual
last out
endurance
testbedding
discipline
run the gauntlet
demanding
overslowness
trained
failable
lightning in a bottle
efficacy
overchallenge
patient
effortful
track
unexacting
semihard
overreach
hard going
testeric
qualifying
superendurance
untesting
hard
pass
hardly
velocitization
cramming
passing
pedal to the metal
sloggish
fitrep
assay
body pump
tireless
toilsome
work one's way up
someone's arse off
mode
difficult
flexuosity
with all one's might
on trial
nautanki
worn-out
trouble
test
wearying
problem
wearing
outmuscle
worn out
pound out
tiring
exhausting
barophilic
boot camp

English words for 'very difficult; severely testing stamina or resolution'

As you may have noticed, above you will find words for "very difficult; severely testing stamina or resolution". Hover the mouse over the word you'd like to know more about to view its definition. Click search related words by phrase or description. to find a better fitting word. Finally, thanks to ChatGPT, the overall results have been greatly improved.

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