1.distinctive和distinct
　　 distinctive“有特色的”，“獨(dú)特的”；
　　 distinct“清楚的，明顯的”；a distinct smell of alcohol on his breath; the distinctive stripes of the zebra.
　　 2.dual和duel
　　 dual“二重的”；dual personality雙重人格；dual control雙重管轄；
　　 duel“決斗，競(jìng)爭(zhēng)”；fight a duel with sb.與某人決斗;challenge sb. to a duel向某人提出決斗；a duel of wits斗智
　　 3.eatable和edible
　　 eatable a.“可食用的，可吃的”；n.“食物、食品”。
　　 edible a.“適合食用的，可以吃的”；n.“食品”。
　　 在指吃的時(shí)候二者可通用：The toast was burnt and barely eatable/edible.但在其他情況下不一樣。
　　 If something is eatable, it may be eaten (though it may not be safe or desirable to do so); but, if something is edible it is safe to eat.
　　 4.economical和economic
　　 economic“經(jīng)濟(jì)學(xué)的，經(jīng)濟(jì)上的”an economic survey of Scotland
　　蘇格蘭經(jīng)濟(jì)調(diào)查；an economic blockade經(jīng)濟(jì)封鎖；economical“節(jié)儉的，經(jīng)濟(jì)的”；He's had to learn to be more economical now that his only income is a small pension.
　　 5.evoke和invoke
　　 evoke“喚起，引起”；evoke admiration引起羨慕。
　　 invoke“祈求(神靈)保佑，乞靈于”，行使(法權(quán))；The shaman invokes the spirits of their ancestors. If our case fails in the national courts we will invoke the European Declaration on Human Rights.
　　 6.fatal和fateful
　　 fatal” causing death or disaster”“致命的”; a fatal disease不治之癥；a fatal wound致命傷。
　　 fateful” crucial, significant, deciding one's fate”“重大的”，“決定性的，決定命運(yùn)的”; On that one fateful day in October, millions of pounds were wiped off the value of shares.
　　 7.fictional和fictitious
　　 fictional“虛構(gòu)的，小說的”。
　　 fictitious“虛構(gòu)的，編造的”(denotes something that is not real and has been created with the intention of deceiving others)；He gave the police a fictitious name.
　　 8.historical和historic
　　 historical“有關(guān)歷史的”，“歷史的”, the historical period歷史階段；historical personage歷史人物。
　　 historic“歷史上有名的，有歷史意義的”, historic town歷史名城。
　　 9.impassable和impassible impassable“不能通行的”，“不可逾越的”；an impassable swam不能通行的沼澤地。
　　 impassible“不感疼痛的；無動(dòng)于衷的”; an impassible God無動(dòng)于衷的神。
　　 10.infer和imply
　　 infer“猜想，臆測(cè)”，“推斷”；infer a motive from an effect從效果推知?jiǎng)訖C(jī)。
　　 imply“含有……的意思”; Do you realize what his words imply?你領(lǐng)會(huì)他說話的含意嗎? I do not imply that you are wrong.我的意思不是說你錯(cuò)了。