What rhymes with first - 1 syllable
 berst
 burst
 cursed
 durst
 furst
 gerst
 hearst
 herst
 hirst
 huerst
 hurst
 kerst
 kirst
 merced
 nursed
 pursed
 thirst
 versed
 werst
 worst
 wurst

What rhymes with first - 2 syllable
 accursed
 accurst
 coerced
 conversed
 disbursed
 dispersed
 emersed
 headfirst
 immersed
 medfirst
 rehearsed
 reversed
 submersed
 traversed

What rhymes with first - 3 syllable
 interfirst
 interspersed
 reimbursed
 unrehearsed

What rhymes with first - 4 syllable
 guaranty-first
 unreimbursed