Synonyms of butt-in

1 Syllable

prier, sleuth, pry, pryer, scout, snoop

2 Syllables

meddler, snooped, gumshoe, snooper, quidnunc, snoopers, ferret

3 Syllables

newsmonger, rubberneck, pragmatist

4 Syllables

busybody, detective, eavesdropper