Puissant

Possessing great power, influence, or effectiveness.

Reach for it when giving an elevated description of a formidable person, force, or institution

The once small coalition became a puissant advocate for clean coastal water.

• playful

  heavyweight

  for a major player with recognized clout in a field

  not when Heavyweight is informal and can reduce nuanced influence to competitive rank.

• everyday

  powerful

  when great strength or influence can be stated directly

  not when Powerful has none of puissant's historical grandeur but is much easier to understand.

• professional

  influential

  if the ability to shape decisions is the specific power

  not when Influential does not imply physical strength or formal authority.

• professional

  potent

  for concentrated effectiveness that produces a strong result

  not when Potent often describes substances, arguments, or symbols rather than institutions.

• formal

  formidable

  when capability commands respect and perhaps apprehension

  not when Formidable introduces difficulty or intimidation absent from purely positive praise.

• literary

  mighty

  for imposing strength expressed with emotional or epic force

  not when Mighty can sound archaic, humorous, or exaggerated.

• powerless
• feeble
• ineffectual

• puissant force

  Public trust made the alliance a puissant force for reform.

• puissant ruler

  The treaty constrained even the region's most puissant ruler.

• puissant influence

  The port exercised a puissant influence on language and trade.