There are less loan words from Russian than you might think. Finnish has taken more words from Swedish. Many of the Russian loanwords in Finnish are only in colloquial use. Then of course, there are common words which are loan words in both languages.
ikkuna, окно, window
kapakka, кабак, bar
kasku, ска́зка, joke (originally “legend”)
koni, конь, horse (colloq.)
kutrit, кудри, curls
leima, клеймо, stamp
lusia, служить, to serve time (in jail or army, colloq.)
lusikka, ложка, spoon
majakka, маяк, a light house
pappi, поп, a priest
piirakka, пирог, pie
pohatta, богатый, rich or powerful ( colloq.)
porkkana, borkan, carrot
putka, будка, jail (orignally a cabin, colloq.)
puuhka, пух, muff or fluff
pätsi, печь, oven (colloq.)
remontti, ремонт, renovation
risti, крести, a cross
rokuli, прогул, missing work (colloq.)
rotu, род, race
rukkanen, рукавица , mitten
rusakko, русак, a brown rabbit
saapas, сапог, a boot
savotta, завод, timber, (originally a factory)
siisti, чистый, clean
tarina, старина, story (originally “old times”)
tavara, товар, commodity
tolkku, толк, sense (colloq.)
torakka, таракан, a cockroach
toveri, товарищ, a comrade
tuumata, думать , to think (colloq.)
tyrmä, тюрьма, a jail (colloq.)
vaino, война eli sota
vapaus, свобода, freedom
vesseli, весёлый, a little boy (originally “happy”, colloq.)
viesti, весть, message
voro, вор, a thief (colloq.)
bonjata, понять, to understand (colloq.)
hotsittaa, хоте́ть, to want (colloq.)
kohmelo, похмелье, a hangover (colloq.)
lafka, лавка, a shop or business (colloq.)
mesta, место, a place (colloq.)
palttoo, пальто, a long coat
sapuska, закуска, food (colloq.)
voda, вода, water