Answer: haplology

AnswerCrossword Clue
HAPLOLOGYWooster for Worcester.
haplologythe contraction of a word by the omission of one or more similar sounds or syllables (as in mineralogy for mineralology or prob-ly for probably)
haplologyThe omission of an occurrence of a sound or syllable that is repeated within a word, e.g., in probly for probably