The List
There are 180 4 letter words with R as the last letter. The highest scoring is CZAR at 15 points in Scrabble. 2 of them contain no vowel at all: BRRR, SKYR.
ACERAFARAGARAGERAJARALARAMIRAPERARARASARAVERBAURBAWRBEARBEERBIERBIRRBLURBOARBOORBOWRBRERBRRRBUHRBURRCARRCHARCHERCHURCOIRCOURCURRCZARDAURDEARDEERDOERDOORDORRDOURDUARDURRDYEREGEREMIREVEREWEREYERFAIRFAURFEARFEERFIARFIERFLIRFLORFOURFURRGAIRGAURGEARGIRRGNARGOERGOORGUARHAARHAIRHEARHEIRHOORHOURHUERICERIZARJEERJOURKBARKEIRKHORKIERKNARKNURKSARKYARLAERLAIRLEARLEERLEHRLEIRLIARLIERLOIRLOORLOURMAARMAIRMAWRMEERMOERMOHRMOORMUIRMURRNEARNOIRNURRODOROMERONEROSAROVEROWEROXEROYERPAIRPARRPEARPEERPIERPOORPOURPUERPUIRPURRREARROARRUERSAIRSCARSCURSEARSEERSEIRSERRSHIRSKERSKYRSLURSMIRSMURSNARSOARSOURSPARSPURSTARSTIRSUERTAHRTEARTEERTEHRTHARTHIRTIARTIERTIRRTORRTOURTSARTYERTZARUSERVAIRVEERVIERVOARWAIRWAURWEARWEERWEIRWHIRYAARYARRYEARYIRRYOUR