Other forms: haplographies
In writing, the accidental dropping of one of two letters, syllables, words, or phrases is called haplography. How many haplographies do you see in the text "sory I mised your cal"?
Haplography comes from the Greek haplo- meaning "single" or "simple," plus -graphy meaning "writing." That's single-writing: writing something once, when you should have written it twice. A common example of haplography is writing "Missippi" for "Mississippi." Do you see it? The first one is missing the repeated iss. The word haplography only applies to writing, not speech: Pronouncing something once when it should be pronounced twice is called haplology (or, if you're feeling funny, haplogy), using the Greek root -logy for "speech" instead of writing.