Freund, m. -e friend
freundlich, friendly, kindly
Frevel, m. — outrage, wrong
freventlich, outrageous, nefarious
Friede, m. -ens peace
Friedenswunder, n. — miracle of peace, peaceful miracle
friedfertig, peaceful
friedlich, peaceful
froh, merry; ( with gen. ) happy in
fröhlich, joyful, glad