interloper
Uninvited party guest
An interloper is someone who intrudes where they don't belong or weren't invited.
The word suggests trespass into a space, situation, or group where the person has no right to be: The cat eyed the new puppy as an interloper in her domain.
It can describe romantic rivals, business competitors encroaching on established territory, or anyone perceived as an unwelcome outsider.
One who enters covertly
- trespasserUnlawful entrant on property
- invaderOne who enters aggressively
- encroacherOne who intrudes gradually
- gatecrasherUninvited event attendee
uninvited guest · prowler · squatter · poacher · crasher · burglar · raider · spy
Person not yet known
- foreignerNon-native person
- alienNon-native being
- newcomerRecent arrival somewhere
- outlanderPerson from another region
nonnative · immigrant · expatriate · unknown quantity · odd one out · fish out of water · fifth wheel · gate crasher
Intrusive meddler
- buttinskyIntrusive meddler in others' affairs
- kibitzerOne who meddles uninvited
- nosy parkerOverly curious meddler
- interfererOne who meddles
snoop · eavesdropper · backseat driver · yenta · gossip · tamperer · pryer · intermeddler
Illegitimate claimant to power
- impostorOne feigning another's identity
- supplanterOne who displaces another
- claimantOne asserting entitlement
- rivalOne who competes against
competitor · upstart · arriviste · social climber · opportunist · market disruptor · claim jumper · queue jumper
infiltrator
One who enters covertly
- trespasserUnlawful entrant on property
- invaderOne who enters aggressively
- encroacherOne who intrudes gradually
gatecrasher · uninvited guest · prowler · squatter · poacher · crasher · burglar · raider · spy · sneak
stranger
Person not yet known
outlander · nonnative · immigrant · expatriate · unknown quantity · odd one out · fish out of water · fifth wheel · gate crasher · party crasher
busybody
Intrusive meddler
- buttinskyIntrusive meddler in others' affairs
- kibitzerOne who meddles uninvited
- nosy parkerOverly curious meddler
interferer · snoop · eavesdropper · backseat driver · yenta · gossip · tamperer · pryer · intermeddler · micromanager
pretender
Illegitimate claimant to power
- impostorOne feigning another's identity
- supplanterOne who displaces another
- claimantOne asserting entitlement
rival · competitor · upstart · arriviste · social climber · opportunist · market disruptor · claim jumper · queue jumper
- outsidersoutcast, outsider, outcasts, pariah, misfit
- unwantedreject, outcast, pariah, uninvited guest, intruder
- intrusionsintrusion, intrude, intruder, intruding, barging in
- Forbiddenforbidden, prohibited, banned, not allowed, off-limits
- investigatorsdetective, investigator, inspector, sleuth, gumshoe
- troublemakerstroublemaker, rascals, delinquents, imps, brats
interloperinsider
One with confidential access
member · rightful owner · native · legitimate heir · stakeholder
interlopernative
Originating from a place
local · native son · native daughter · old-timer · autochthon