Sleekly rhymes with:
bleakley, obliquely, beakley, biweekly, bleakley, meekly, obliquely, steakley, szekely, uniquely, weakley, weakly, weekley, weekly, yeakley
Sleekly sounds like:
schlagel, schlegel, schuylkill, slagel, slagle, slickly, sluggishly, sociological