Synonyms of the word

diligent

• adj. Performing with intense concentration, focus, responsible regard.

assiduous

• adj. Hard-working, diligent or regular (in attendance or work); industrious.

busy

• adj. Crowded with business or activities; having a great deal going on.
• adj. Engaged in activity or by someone else.
• adj. Having a lot going on; complicated or intricate.
• adj. Officious; meddling.
• v. (transitive) To make somebody busy, to keep busy with, to occupy, to make occupied.
• v. (transitive) To rush somebody.
• n. (slang, Britain, Liverpudlian, derogatory) A police officer.

careful

• adj. (obsolete) Full of care or grief; sorrowful, sad.
• adj. (obsolete) Full of cares or anxiety; worried, troubled.
• adj. Having care (for); attentive to potential danger, error or harm; cautious.
• adj. Conscientious and painstaking; meticulous.

hardworking

• adj. Of a person, taking their work seriously and doing it well and rapidly.

industrious

• adj. Hard-working and persistent.

patient

• adj. (of a person) Willing to wait if necessary; not losing one's temper while waiting.
• adj. Constant in pursuit or exertion; persevering; calmly diligent.
• adj. (obsolete) Physically able to suffer or bear.
• n. A person or animal who receives treatment from a doctor or other medically educated person.
• n. (linguistics, grammar) The noun or noun phrase that is semantically on the receiving end of a verb's action.
• n. One who, or that which, is passively affected; a passive recipient.

persevering

• n. perseverance.
• v. present participle of persevere.
• adj. Tending to persevere.

sedulous

• adj. (of a person) Diligent in application or pursuit; constant, steady, and persevering in business or in…
• adj. (of an activity) Carried out with diligence.

tireless

• adj. Indefatigable, untiring and not yielding to fatigue.
• adj. Without a tire (wheel covering); tyreless.

untiring

• adj. Not able to be tired; inexhaustible.
• adj. Unfailing; resolute.