Of course. There are about a million words that start with R in the English language. See the Related Link below for a list of them.
Words that start with R and end with R:racerradarradiatorrafterrancherrancorratherrazorreaderreaperreappearrearreceiverrecorderrecoverregisterregularregulatorreindeerrelieverremainderrememberreminderremoverrenterreoccurrepairreporterresistorresponderretailerretainerretrieverrevolverriderrigorringerriserriverroarrobberrockerrollerrooferroosterrosterrubberrulerrumorrunner
Words that start with G and end in R are:gamblergangstergardenergeargendergeneratorghostwritergingerglacierglaziergliderglimmergoitergold-diggergolfergoobergoofiergophergossamergrandeurgranulargrasshoppergrazerguitargutter
Words that start with R and end with N are:raccoonrainradonranrationravenreasonrecessionreckonreflectionrefrainrefrigerationreinremainreunionribbonriboflavinripenroanrobinRomanrottenruffianruinrun
Some winter words that start with R are:raw windsroaring firesrime around the windowsroad salt
research R key
I know of no words that start with R for the words World War 2. Now if you wanted my ideas on the matter, I would say Righteousness VS. Evil would be the perfect description of World War 2.
Many Greek words start with 'r' just as they do in English, Spanish, and other languages.
Some winter words that start with R are:raw windsroaring firesrime around the windowsroad salt
Some six letter words that start with W and end with R are:waiterwaiverwalkerwanderwasherweaverwelderwelterwickerwinnerwinterwitherwooferwriter
roar
RADIANT
Razor