sing singer read reader own owner perform performer piano pianist tour tourist violin violinist travel traveler direct director direction discuss discussion visit visitor village villager terror terrorist law lawyer post poster wait waiter waitress behave behavior free freedom fly flight true truth learn learner golf golfer achieve achievement listen listener own owner interview interviewer program programming programmer busy business businessman high height king kingdom describe description gym gymnast head headache stomach stomachache ill illness safe safety 8.wake awake 9. end ending light lighting say saying think thought find finding build building mean meaning follow following 10.please pleased pleasure pleasant unpleasant 11.science scientist scientific 12. relax relaxing relaxed .embarrass embarrassing embarrassed exhaust exhausting exhausted tire tired tiring interest interesting interested bore bored boring surprise surprising surprised amaze amazed amazing frustrate frustrating frustrated scare scared scary disappoint disappointment disappointing disappointed 13.silence silent 14.thin thinner thinnest fat fatter fattest red redder reddest big bigger biggest wet wetter wettest hot hotter hottest 15.danger dangerous 16. adjust adjustable suit suitable comfortable uncomfortable 17.break broken speak spoken annoy annoyed lose lost terrify terrified worry worried 18.memory memorize 19.fair unfair friend friendly unfriendly friendship happy unhappy happily happiness familiar unfamiliar important
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