Helicon rhymes with:
oerlikon, polysilicon, digicon, ethicon, lexicon, logicon, oerlikon, polysilicon, semicon, technicon
Helicon sounds like:
halcion, halcyon, halcyone, halligan, halogen, helgesen, helgeson, hellickson, hilgeman, hillesheim, hillsman, hillson, hilsman, hilson, holguin, holquin, holzman, holzmann, hooligan, huelsman, huelsmann, hulgan, hulsman