Bother, aim, accomplishment, (hard) yakka, and application are all synonyms for effort. Laziness and neglect are antonyms of effort. And here are 73 another word for effort.
Aim, apply oneself, assay, attempt, bash, crack, do one's best, endeavour, essay, exert oneself, give it a burl, go, have a go/shot/crack/stab/bash, labour, seek, set out, shot, stab, strive, struggle, take it on oneself, toil, try, undertake, whack, work, and give it a fly are all synonyms for effort.
Accomplishment, achievement, attainment, coup, creation, deed, enterprise, exploit, feat, handiwork, master stroke, opus, performance, positive result, production, result, success, triumph, undertaking, work, and stroke of genius are all another word for effort.
(hard) yakka, application, bother, elbow grease, endeavour, energy, exertion, force, graft, labour, muscle, power, slog, strain, stress, striving, struggle, sweat, the sweat of one's brow, toil, travail, trouble, work, and moil are all synonyms for effort.
Effort synonym page has a variety of synonyms that differ in length. 1 synonym with 2, 15, 18, and 24 letters and 2 synonyms with 3, and 14 letters. 14 synonyms with 4 letters and 8 synonyms with 5 letters.
10 synonyms with 6 letters and 6 synonyms with 7, and 11 letters. 5 synonyms with 8, and 9 letters and 4 synonyms with 10 letters. 3 synonyms with 12 letters. For a total of 69 another word for effort.
Hard work brings success.
Persistence leads to results.
Always give your best.
Strive for constant improvement.