stub

1. pole; post
   Auto je udario u stub pored puta. — The car hit a pole by the road.
   Na stubu je zalepljen oglas za izgubljenog psa. — There's a lost dog notice stuck on the post.
2. (in architecture) column; pillar
   Crkvu drže četiri kamena stuba. — The church rests on four stone columns.
3. (of a person, idea) pillar; mainstay
   Majka je bila stub naše porodice. — Mother was the pillar of our family.

Kičmeni stub means the spine; Croatian uses stup instead of stub.