The best replacement for blazer is suit.

The best alternatives to blazer are rated as following:
★★★★★  suit
★★★★  sport coat
★★★  bronco
★★★  explorer
★★★  jacket
★★★  suit jacket
★★  trailblazer
★★  sportcoat
★  jimmy
★  sports coat
★  cardigan
★  cherokee
★  sports jacket
★  blazer brass
★  fusion vanes
★  vest
  pmc
  mini mag
  s10
  coat
  sportscoat
  suit coat
  ford explorer
  peacoat
  sweater
  jeep cherokee
  ford bronco
  quickspin vanes
  sport jacket
  suits
  quick spin

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

Other search terms related to blazer and their ratings are:
★★★★★ jeans
★★★★★ hoodie
★★★★ dress
★★ tie
★★ shorts
★★ polo
★★ t shirt
★★ khakis
★ v neck
★ scarf
★ t-shirt
★ matching pants
★ chinos
★ pocket square
sweater
brass buttons
khaki pants
leather sleeves
You have in mind a companion for blazer and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of blazer in all years. Click on graph for more.
blazer
suit
sport coat