challenge
The group were aware that they faced a challenge convincing the minister to change her mind.
He faces a challenge to keep the team's morale up.
Graduates may face challenges finding employment in the current climate.
The project faces even greater challenges than those it has overcome so far.
SMART Vocabulary: related words and phrases Complicated and difficult to do
advanced
ambitious
ambitiously
another
arduous
formidably
get blood out of/from a stoneidiom
grail
gruelling
gruellingly
onerously
overdemanding
painstaking
picnic
problematic
trickily
tricky
tuff
ultra-sensitive
unintuitive
You can also find related words, phrases, and synonyms in the topics:
Difficult situations and unpleasant experiences