Here are some: enmesh, enserf, enters, ephebe, eskers, esteem, esters, ethene, ethers, etwees, exceed, excels, except, excess, expect, expels, expend, expert, exsect, exsert, extend, extent, extern
5 letter words that contain FOR:forceforgeforgoformsforum
ballooningbottleneckbottomlessbuttercupsbuttonholecellphonescorrelatescorrugatescottontailcorrectioncorruptiondifferencedissimilardissonancehammerheadlitterbugsmissionarypassagewaypatterningsaddlebagssettlementwallpaperssleepwalkssweetheart
6-letter wordsdewier
Some six letter words with the fourth letter U are:abductaboundabruptabsurdaccuseacquitactualadjustalludeallureambushamountampuleannualaroundarousearoundarouseassumeassureastuteauburnaugustautumnbeautybelugabemuseblousecasualclausecloudycolumncrouchdebunkdeducedeductdefusedeludedelugedeluxedemuredeputydiluteeffuseendureengulfenoughensureeunuchexcuseexhumefecundfibulafigureflauntfuturegerundgrouchgroundgrouseimmuneimmureimpugnimpureimputeinduceinductinfuseinjureinsultinsurejaguarjejunejujubekabukikahunalegumeliquidliquorlocustluxurymanualmanurematureminuetminutemisusemodulemutualnaturenebulanoduleobtuseoccultoccupyonrushpenuryperuserebuffrebukereducerefugerefundrefuserefutereputeresultresumereturnritualrobustrotundsalutesecureseducesequelsequinsexualshouldshrunksleuthslouchspousesprucesprungstruckstrungsuburbsuturetenurethoughthrushthrusttraumatroughtroupetubuletumultuncurlundulyunfurlunjustunrulyunsungunsureupturnvacuumvicunavisualvolumeyogurt
Bookkeeper and jackknife are words. They contain the letters kk.
5 letter words that contain FOR:forceforgeforgoformsforum
ballooningbottleneckbottomlessbuttercupsbuttonholecellphonescorrelatescorrugatescottontailcorrectioncorruptiondifferencedissimilardissonancehammerheadlitterbugsmissionarypassagewaypatterningsaddlebagssettlementwallpaperssleepwalkssweetheart
6-letter wordsdewier
Some six letter words with the fourth letter U are:abductaboundabruptabsurdaccuseacquitactualadjustalludeallureambushamountampuleannualaroundarousearoundarouseassumeassureastuteauburnaugustautumnbeautybelugabemuseblousecasualclausecloudycolumncrouchdebunkdeducedeductdefusedeludedelugedeluxedemuredeputydiluteeffuseendureengulfenoughensureeunuchexcuseexhumefecundfibulafigureflauntfuturegerundgrouchgroundgrouseimmuneimmureimpugnimpureimputeinduceinductinfuseinjureinsultinsurejaguarjejunejujubekabukikahunalegumeliquidliquorlocustluxurymanualmanurematureminuetminutemisusemodulemutualnaturenebulanoduleobtuseoccultoccupyonrushpenuryperuserebuffrebukereducerefugerefundrefuserefutereputeresultresumereturnritualrobustrotundsalutesecureseducesequelsequinsexualshouldshrunksleuthslouchspousesprucesprungstruckstrungsuburbsuturetenurethoughthrushthrusttraumatroughtroupetubuletumultuncurlundulyunfurlunjustunrulyunsungunsureupturnvacuumvicunavisualvolumeyogurt
Bookkeeper and jackknife are words. They contain the letters kk.
Nerve and nerdy are words. They contain five letters.
Cylin
There are no English words that contain all those letters, but here are some eight-letter words: alehouse, hamulose
here, logo, stat
Abandonment, declaration and legislative are words. The words contain eleven letters.
The entire difference is found in the fourth letter of those words ... the remaining 8 letters are identical in both. In one of the words, the fourth letter is the vowel 'a', whereas in the other one, the fourth letter is the vowel 'i'. Their definitions are also different.
Were and here are four letter words. Additional words include mere and fete (to honor with a celebration).