Here's what rhymes with polymorphisms.

Consider these alternatives

polymorphism / dwarfism nucleotide / side mutations / relations haplotypes / types alleles / varies mutation / operation allele / very phenotypes / types genes / means nucleotides / types genotypes / types genotype / might isoforms / forms phenotype / might splice / price genomic / economic isoform / form missense / conditions molecule / rule conformational / educational nucleic / archaic splicing / driving chromosome / home genetic / magnetic