The best replacement for semicolon is comma.

The best alternatives to semicolon are rated as following:
★★★★★  comma
★★★★★  dash
★★★★★  colon
★★  colon use
★  colon usage
★  comma list
★  hyphen
★  em dash
★  coma
★  comma after colon
  colon before a list
  semi-colon
  semi colon
  full stop

Your alternative for semicolon is not listed? Suggest!
Speaking about semicolon, one probably shouldn't forget about however.

Other search terms related to semicolon and their ratings are:
★★★★★ however
★★★★ and
★★★ therefore
★★ although
★★ coordinating conjunction
★★ conjunctive adverb
★★ whereas
★ such as
★ independent clauses
★ list
★ conjunction
★ thus
complex sentence
conjunctive adverbs
colon
You have in mind a companion for semicolon and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of semicolon in all years. Click on graph for more.
semicolon
comma
dash