Synonyms of laborious

1 Syllable

stiff, tough, ter

2 Syllables

wearing, heavy, grueling, troublous, snoozer, painful, upstream, hard-won, tedious, strained, grinder, strenuous, nagging, toilful, arduous, wicked, smarting, dragger, forced

3 Syllables

industrious, disturbing, effortful, toilsome, diligent, perturbing, difficult, ballbuster, assiduous, backbreaking, fatiguing, onerous, ponderous, unsettling, sedulous, sobering, upsetting, herculean, heightened, labored

4 Syllables

infestive, boresome, wearisome, difficile, operose, burdensome, troublesome, tiresome, unamusing, overtaxing

5 Syllables

enervative

6 Syllables

energy-consuming