Rethinking/rewording on this:
/l/ sound can be ommited in some words but cannot be replaced with /r/ sound, although the sounding organ (tip of the mouth) is in the position of /r/ sound:
Revolution:
Volume;
Volunteer;
/l/ sound can be ommited in some words but cannot be replaced with /r/ sound, although the sounding organ (tip of the mouth) is in the position of /r/ sound:
Revolution:
Volume;
Volunteer;