Here's what rhymes with immediately.

Consider these alternatives

soon / moon then / when later / greater when / then before / for refused / used again / then would / could did / it until / will decided / presided should / would authorities / minorities them / then however / never yet / said if / is him / in put / would they / say saying / playing could / good move / use whether / together came / game to / do leave / believe request / best notified / side never / ever