some slavic roots?

hi together,

I am pretty interested if the fallowing words are too into another
slavic language except the bulgarian and serbian languages:

vojevoda=meaning local ruler, small king
opinka or opinak= this coudl be a shoe but is likely an indian
moccassin
horo= is a way to dance where people make a circle and keeps their
hands together making the same steps in the rithm of the music

if they are not properly slavic words, could it be explained somehow
thier ethimology?

best regards

A. Moeller