Words with many contradictory meanings are no problem, as long s people using the words know which meaning applies to the subect under discussion."Over the Rainbow" has a clssic ballad structure,32 bars with an AABA format(B being the middle 8). "Chevy Chase" has a classic ballad structure, four line verses, 2 and 4 rhyming, with 4.3.4.3 feet per line. Both perfectly useful and well understood statements. No probs. Unlike the word"folk", whose various menaings do cause serious problems here and elsewhere!