Synonyms of painstaking

2 Syllables
earnest, stickling, fussy, hellbent, picky, punctual, fussier, stickler, set-up, thorough, exact, strenuous, heedful, slambang, slam-bang
3 Syllables
finicky, structured, methodic, industrious, fussbudget, hard-working, conscientious, thoroughgoing, diligent, punctilious, clocklike, fussiness, assiduous, careful, scrupulous, sedulous, unwearying, thoroughness, exacting
4 Syllables
methodical, scrupulousness, persnickety, formalistic, meticulous, fastidiousness, punctiliousness, particular, persevering, conscionable, picky-picky, disciplined
5 Syllables
businesslike, overconscientious, systematical, many-faceted, elaborate, well-regulated, overfastidious, meticulousness
6 Syllables
indefatigable