在英語合成詞中，有一種不是很普遍的，也較少人注意的，那就是疊聲合成詞（repetition compounds）。
疊聲合成詞多數(shù)是名詞，也可轉(zhuǎn)化為形容詞、動(dòng)詞或副詞，有三種形式：
Ⅰ兩個(gè)字都相同，如：
● He pooh-poohed my idea.（輕視）
● It is a hush-hush report not to be made public.（秘密的）
● The boy said bye-bye to his parents.（再見）
其他類似的疊聲合成詞有：
clank-clank（鏈子聲）, drip-drip（雨水聲）, tap-tap（打字機(jī)的聲音）, so so（馬馬虎虎）, goody-goody（偽善的）, fifty-fifty（各半的）, pretty-pretty（打扮得很俗氣的）, thump-thump（砰然聲）, snip-snip（剪聲）等。
Ⅱ第二字的元音和第一字的不同，如：
● Electric networks criss-cross the whole island.（交叉往來）
● The government dilly-dallied over lengthening the retirement age.（猶疑不決）
● The blinds flip-flopped in the wind.（飄搖、搖曳）
● The drunkard zig-zagged along the road.（彎彎曲曲地走）
● Most women like knick-knacks.（小裝飾品）
● Is it possible to get rid of the riff-raff of a society?（下等人）
● The graduating students had a pleasant sing-song in the garden.（歌唱會(huì)）
● Do you like wishy-washy soup?（淡而無味的）
Ⅲ第二字的輔音和第一字的不同，如：
● Barbarians in ancient times had to kow-tow to government officials.（叩頭）
● Some people are not used to the hub-bub of the city. （喧囂）
● I pity those who lead a humdrum life year in year out.（單調(diào)的）
● Willy-nilly, young people at the age of 18 must go for military training.（不管愿意或不愿意）
● Don't play hanky-panky with your friends.（陰謀詭計(jì)）
● When rain suddenly came, the pedestrians ran helter-skelter.（狼狽地）
● Tom and his friends used to hob-nob in the bar.（共飲、親切地交談）
● The defeated soldiers retreated pell-mell.（混亂地）
● The market in the morning is usually filled with hurly-burly.（喧鬧）
疊聲合成詞形象清新，但數(shù)量不多，用的范疇也較局限，通常都不在嚴(yán)肅或正式的場合出現(xiàn)。
疊聲合成詞多數(shù)是名詞，也可轉(zhuǎn)化為形容詞、動(dòng)詞或副詞，有三種形式：
Ⅰ兩個(gè)字都相同，如：
● He pooh-poohed my idea.（輕視）
● It is a hush-hush report not to be made public.（秘密的）
● The boy said bye-bye to his parents.（再見）
其他類似的疊聲合成詞有：
clank-clank（鏈子聲）, drip-drip（雨水聲）, tap-tap（打字機(jī)的聲音）, so so（馬馬虎虎）, goody-goody（偽善的）, fifty-fifty（各半的）, pretty-pretty（打扮得很俗氣的）, thump-thump（砰然聲）, snip-snip（剪聲）等。
Ⅱ第二字的元音和第一字的不同，如：
● Electric networks criss-cross the whole island.（交叉往來）
● The government dilly-dallied over lengthening the retirement age.（猶疑不決）
● The blinds flip-flopped in the wind.（飄搖、搖曳）
● The drunkard zig-zagged along the road.（彎彎曲曲地走）
● Most women like knick-knacks.（小裝飾品）
● Is it possible to get rid of the riff-raff of a society?（下等人）
● The graduating students had a pleasant sing-song in the garden.（歌唱會(huì)）
● Do you like wishy-washy soup?（淡而無味的）
Ⅲ第二字的輔音和第一字的不同，如：
● Barbarians in ancient times had to kow-tow to government officials.（叩頭）
● Some people are not used to the hub-bub of the city. （喧囂）
● I pity those who lead a humdrum life year in year out.（單調(diào)的）
● Willy-nilly, young people at the age of 18 must go for military training.（不管愿意或不愿意）
● Don't play hanky-panky with your friends.（陰謀詭計(jì)）
● When rain suddenly came, the pedestrians ran helter-skelter.（狼狽地）
● Tom and his friends used to hob-nob in the bar.（共飲、親切地交談）
● The defeated soldiers retreated pell-mell.（混亂地）
● The market in the morning is usually filled with hurly-burly.（喧鬧）
疊聲合成詞形象清新，但數(shù)量不多，用的范疇也較局限，通常都不在嚴(yán)肅或正式的場合出現(xiàn)。