Synonyms for “improve”

verb

1. =  enhance, better, add to, upgrade, amend, mend, augment, embellish, touch up, ameliorate, polish up • He improved their house.
   opposites: damage, harm, mar, worsen, impair
2. = get better, pick up, look up (informal), develop, advance, perk up, take a turn for the better (informal) • The weather is beginning to improve.
3. = make better, perfect, polish, strengthen, temper, refine, cultivate, elevate, hone • He said he wanted to improve his football.
4. =  recuperate, recover, rally, mend, make progress, turn the corner, gain ground, gain strength, convalesce, be on the mend, grow better, make strides, take on a new lease of life (informal) • He had improved so much the doctor cut his dosage.
5. =  reform, shape up (informal), get it together (informal), turn over a new leaf, get your act together (informal), clean up your act (informal), pull your socks up (British, informal)

   See improve on something

   1. =  beat, top, better, cap (informal), exceed, trump, surpass, outstrip, outdo • We need to improve on our performance against France.