Dictionary.com
Thesaurus.com

point mutation vs. frameshift

noun

Genetics.
  1. a change in a single base in a nucleotide sequence.

[freym-shift] / ˈfreɪmˌʃɪft /

noun

Genetics.
  1. the addition or deletion of one or more nucleotides in a strand of DNA, which shifts the codon triplets of the genetic code of messenger RNA and causes a misreading during translation, resulting in an aberrant protein and therefore a mutation.