Thistle rhymes with:
antimissile, bisel, bissell, bristle, cissell, dismissal, entwistle, epistle, euromissile, fissel, fissell, fissile, glycel, gristle, hisel, kissel, kissell, missal, missel, missile, schissel, sissel, this'll, whistle, wissel
Thistle sounds like:
tacitly, tactile, teasdale, testily, textile, textual, tightly, tisdale, tisdel, tisdell