4.28

hopeless, careless, homeless, tireless, hopeful

fearful, cheerful, careful, graceful, happily

friendly, angrily, swiftly, suddenly, darkness

goodness, sadness, kindness, weirdness, effortess

5.28

geology, geometry, geography, geologist, action

enact, transport, import, portable, bicycle

cyclone, encyclopedia, autograph, automobile, automatic

autobiography, telegraph, photograph, paragraph, react

6.28

binocular, bicentennial, bilingual, bipedal, triceps

triathlon, triad, triplicate, unicorn, unify

union, unique, semicircle, semicolon, semiannual

centipede, century, centennial, tripod, bilingual