Kiranti
Spreadsheet below: 210-word lists extracted, merged, and organized from Linguistic Survey of Nepal (LinSuN) reports by Tribhuvan University.
Kiranti lexical innovations include the words for 'tooth' (*kəŋ) and 'water' (*ku/*kwa). (Although interestingly, these forms are also found in Proto-Kho-Bwa.)
Sources
Linguistic Survey of Nepal (LinSuN), Tribhuvan University (sociolinguistic surveys available on Tribhuvan University's website)