Synonyms of backbreaker

1 Syllable

hard, tough, strict, trying

2 Syllables

wearing, pressing, fussy, grievous, upstream, taxing, hard-won, nagging, weighty, stringent

3 Syllables

ambitious, demanding, insistent, critical, difficult, imperious, exhausting, onerous, clamorous, exigent, querulous, drudgery, exacting

4 Syllables

oppressive, difficile, bothersome, dictatorial, troublesome

5 Syllables

importunate