List of toilsome synonyms and toilsome related words.
Herculean, abstruse, arduous, backbreaking, brutal, burdensome, complex, critical, crushing, delicate, demanding, difficile, difficult, draining, effortful, enervating, exacting, exhausting, fatiguesome, fatiguing, forced, formidable, grueling, hairy, hard, hard-earned, hard-fought, heavy, hefty, intricate, jawbreaking, killing, knotted, knotty, labored, laborious, mean, no picnic, not easy, onerous, operose, oppressive, painful, punishing, rigorous, rough, rugged, set with thorns, severe, spiny, steep, strained, straining, strenuous, stressful, thorny, ticklish, tiresome, tiring, tough, tricky, troublesome, trying, uphill, weariful, wearing, wearisome, wearying, wicked