What rhymes with course - 1 syllable
 borse
 bourse
 coarse
 corse
 'course
 force
 forse
 fourths
 hoarse
 horse
 morse
 morss
 norse
 nourse
 sorce
 source
 vorce

What rhymes with course - 2 syllable
 divorce
 endorse
 enforce
 ensource
 gift-horse
 laforce
 midcourse
 outsource
 perforce
 remorse

What rhymes with course - 3 syllable
 reinforce