孔子 （コウシ） Confucius

孔隙率 （コウゲキリツ） porosity

瞳孔 （ドウコウ） pupil (of the eye)

細孔 （サイコウ） pore, small cavity, puncture

孔雀 （クジャク） peafowl (incl. the male peacock, female peahen, and young peachick)

孔子 （コウシ） Confucius

穴 （あな） hole, opening, perforation, pit, hollow, hole (in the ground, etc.), burrow, den, lair, holt, hole, deficit, shortage, missing person (in a team, meeting, etc.), vacancy, opening, flaw, well-kept secret place, upset victory (with a large payoff), pit (of a theater), hiding place, hideout, underbelly (of society, etc.)

巣穴 （すあな） nesting hole, burrow, den

音孔 （おとあな） tone hole