Synonyms for Foreign body:

• n.

  •stranger (noun)
  • immigrant,
  • migrant,
  • wanderer,
  • alien,
  • transient,
  • unknown,
  • outlander,
  • drifter,
  • squatter,
  • interloper,
  • newcomer,
  • guest.

• Other synonyms:

  •
  • carrier,
  • fester,
  • candida,
  • defense,
  • cross infection,
  • antibody,
  • cross-contamination,
  • contagion,
  • biosecurity,
  • defense mechanism.
  •Other relevant words:
  • filth,
  • impurity,
  • pollution,
  • mote,
  • speck,
  • pollutant,
  • contaminant,
  • misfit,
  • oddball,
  • blemish,
  • intruder,
  • smut,
  • black sheep,
  • sliver,
  • splinter,
  • foreign matter,
  • dirt,
  • weed,
  • stone.

Antonyms for Foreign body:

• n.

  • stranger
    citizen, local, native, acquaintance, friend, national.