The Swedish term "kärr, moras, träsk, myr" matches the English term "morass"

other swedish words that include "moras" : english :
sumpmark, träsk, moras, kärr marsh
other swedish words that include "myr" : english :
myra ant
myrstack ant-hill
myriad myriad
myrra myrrh
myrten myrtle
arbetsmyra working-ant