Here's what rhymes with feldspathlc.
whelk yarmelke Words that almost rhyme with feldspathlc
sec shek haec heck check neck deck desk wreck cheque tech msec nec peck spec speck beck dec rec fleck lech burlesque trek exec statuesque bedeck hatcheck recheck kopeck spellcheck grotesque bottleneck arabesque turtleneck discotheque quarterdeck