Letters that make susurrous
s, o, r, u are letters that make 'susurrous'
1 possible definitions for 'susurrous'
Under this definition, susurrous is an adjective and has the following properties:
mutter, muttering, murmuration, murmur, murmuring, mussitation are derivatives of 'susurrous'.
soft is similar to susurrous.
"a murmurous brook", "a soughing wind in the pines", "a slow sad susurrous rustle like the wind fingering the pines"- R.P.Warren