Synonyms for Cold spell:

• n.

  •
  • cold,
  • briskness,
  • frost,
  • a nip in the air,
  • freeze.
  •cold front (noun)
  • polar front,
  • cold wave,
  • squall line,
  • cold sector,
  • snap.
  •cold snap (noun)
  • cold weather.

• Other synonyms:

  •
  • nuclear winter,
  • wind chill.
  •Other relevant words:
  • ague.