What rhymes with soup - 1 syllable
 coop
 coupe
 croup
 droop
 drupe
 dupe
 goop
 group
 hoop
 loop
 loup
 loupe
 poop
 scoop
 sloop
 snoop
 stoop
 stoup
 swoop
 troop
 troupe
 whoop

What rhymes with soup - 2 syllables
 recoup
 regroup

What rhymes with soup - 3 syllables
 intergroup