ballooningbottleneckbottomlessbuttercupsbuttonholecellphonescorrelatescorrugatescottontailcorrectioncorruptiondifferencedissimilardissonancehammerheadlitterbugsmissionarypassagewaypatterningsaddlebagssettlementwallpaperssleepwalkssweetheart
Buzzing
butterfly
ballroomballgamebafflingbattlingbillablebillfoldbloomingbutteredcommutercommentscommandocollapsecollagencarriagecurrencycommonlydifferedhammeredfreebornfreebasefreehandfreeloadhorriblygreenerygroomingfloodlithappenedjudderedmarriagepepperedsleepingsnoopingscoopingspeedingsufferedsuddenlysuggestssuppliedsupportssupposedsuppresssurroundsweepingtrammels
dividing
ballooningbottleneckbottomlessbuttercupsbuttonholecellphonescorrelatescorrugatescottontailcorrectioncorruptiondifferencedissimilardissonancehammerheadlitterbugsmissionarypassagewaypatterningsaddlebagssettlementwallpaperssleepwalkssweetheart
Buzzing
butterfly
ballroomballgamebafflingbattlingbillablebillfoldbloomingbutteredcommutercommentscommandocollapsecollagencarriagecurrencycommonlydifferedhammeredfreebornfreebasefreehandfreeloadhorriblygreenerygroomingfloodlithappenedjudderedmarriagepepperedsleepingsnoopingscoopingspeedingsufferedsuddenlysuggestssuppliedsupportssupposedsuppresssurroundsweepingtrammels
dividing
reversed
benefitsfanaticalfinishedgeneralsgenerategeneroushonoraryminicampmonogamymonogrammonoxidemonorailrenegaderenewalssinistertenementvenerate
hymn
array
splotch could work.
The eight-letter word you're looking for is "STARTING." The third and fourth letters are both "R," and if you add the letters "S" and "G" at the beginning and end, you get the word "STARTING," which can help you write exams. Now, go ace those tests, honey!
facetious, abstemious