剛

strong; potent; competent; domineering; tough

strong; brawny; powerful; healthy; rugged

good (at); skilled; knowledgeable

As 〜に強い

being able to handle; know how to deal (with); durable (against); resistant (to); resilient

firm; rigid; solid

intense; strong; fierce; high

dependable; trustworthy

obstinate; stubborn; headstrong

strength; toughness; bravery; boldness

overwhelming strength; extremely strong person; powerhouse; very strong player; very strong team

bold; daring; dauntless; intrepid; stout-hearted

vajra (indestructible substance); diamond; adamantine

thunderbolt; Indra's weapon; Buddhist symbol of the indestructible truth

Adjectival nouns or quasi-adjectives (keiyodoshi)

herculean strength

強力 only

mountain carrier-guide

integrity; moral courage; rigidity

Formal or literary term

fortitude; firmness of character; sturdiness; inner strength; hardihood

strong arm; stout arm

Nouns which may take the genitive case particle 'no'

ability to carry out a difficult job; capable person

diamond

bristle; seta; stiff hair; coarse hair

Baseball

blazing fastball

very strong person; brave warrior; veteran

vigour; vigor; virility; health; sturdiness

stiffness; rigidity

valor and decisiveness (valour)

pilgrim's staff

bravery; prowess

sturdy spirit; bold; daring; brave; valiant; undaunted; stouthearted

superhuman strength; Herculean strength

rigid body

vajra (mystical weapon in Hinduism and Buddhism)

obstinacy; stubbornness