different between buttinsky vs encroacher

English

From butt in (“to interject”) +? -sky, humorously modeled after Russian names, early 20th c.

buttinsky (plural buttinskys or buttinskies)

(informal, derisive, Canada, US) One who is prone to butt in, interrupt, or get involved where they are not welcome.
Synonyms: busybody, backseat driver, kibitzer, meddler
(telecommunications) (usually buttinski) A robust portable one-piece telephone instrument with clips, used by technicians and lines staff for testing telephone circuits or making a temporary connection to a telephone line.

encroach +? -er

encroacher (plural encroachers)

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