| laboriously(adverb, easy, badly, severely, vigorously) |
| strenuously(adverb, badly, severely, vigorously, earnestly) |
| painfully(adverb, badly, severely, vigorously, painfully) |
| hardly(adverb, badly, severely, vigorously, extremely) |
| hard(adverb, easy, badly, extremely, hardly) |
| heavily(adverb, easy, laboriously, strenuously) |
| industriously(adverb, vigorously, earnestly, actively, hastily) |
| mightily(adverb, forcefully) |
| difficultly(adverb, hard, easy, difficultly, laboriously) |
| severely(adverb, painfully, difficultly) |
| toilsomely(adverb, badly, severely, vigorously, hardly) |
| toughly(adverb, difficultly) |
| troublesomely(adverb, painfully, difficultly) |
| assiduously(adverb, seriously, intensely, vigorously, earnestly) |
| awkwardly(adverb, badly, severely, vigorously, hardly) |
| gruelingly(adverb, badly, severely, vigorously, hardly) |
| harshly(adverb, badly, severely, vigorously, hardly) |
| onerously(adverb, difficultly) |
| oppressively(adverb, painfully, difficultly) |
| painstakingly(adverb, vigorously, earnestly, actively, hastily) |