Synonyms of the word

hard-hitting

• adj. Aggressively vigorous or forceful.

aggressive

• adj. Tending or disposed to aggress; characterized by aggression; making assaults; unjustly attacking.
• adj. (programming) Of code optimization techniques: exploiting every opportunity to be applied.

effective

• adj. Having the power to produce a required effect or effects.
• adj. Producing a decided or decisive effect.
• adj. Efficient, serviceable, or operative, available for useful work.
• adj. Actually in effect.
• adj. (geometry, of a cycle or divisor) Having no negative coefficients.
• n. (military) A soldier fit for duty.

effectual

• adj. Producing the intended result; entirely adequate.

efficacious

• adj. Effective; possessing efficacy.

high-pressure

• adj. Operating with high pressures, such as several times atmospheric pressure but relative.
• adj. Tense, stressful.

trenchant

• adj. (obsolete) Fitted to trench or cut; gutting; sharp.
• adj. (figuratively) Keen; biting; vigorously effective and articulate; severe.