| Synonym Collection v1.1 | ||
| Main Entry: | onerous | |
| Part of Speech: | adjective | |
| Synonyms: | arduous, backbreaking, burdensome, demanding, difficult, exacting, exhausting, grueling, hard, heavy, laborious, oppressive, pressing, rigorous, strenuous, taxing, toilsome | |
| Roget's II: The New Thesaurus | ||
| Main Entry: | burdensome | |
| Part of Speech: | adjective | |
| Definition: | Requiring great or extreme bodily, mental, or spiritual strength. | |
| Synonyms: | arduous, backbreaking, demanding, difficult, effortful, exacting, exigent, formidable, hard, heavy, laborious, oppressive, rigorous, rough, severe, taxing, tough, trying, weighty | |
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