Synonyms For "Difficult" :
1 syllable:
hard, rough, tall, tight, tough, vexed
2 syllables:
awkward, baffling, catchy, fractious, knotty, nasty, rocky, rugged, sticky, thorny, touchy, tricky, trying
3 syllables:
ambitious, arduous, challenging, delicate, demanding, effortful, elusive, serious, ticklish, troublesome
4 syllables:
embarrassing, herculean, problematic