The best replacement for letter is email.

The best alternatives to letter are rated as following:
★★★★★  email
★★★★  memo
★★★★  a4
★★★★  legal size
★★★  letter of interest
★★★  legal
★★  resignation
★★  flat
★★  spirit of the law
★★  resume
★★  recommendation
★★  intent
★  interest
★  certified letter
★  parcel
★  letter of intent
★  reference
★  friendly letter
★  flat usps
★  legal size paper
★  spirit of the law examples
★  resignation sample
★  recommendation letter
★  request
  recommendation sample
  legal paper
  query letter
  recommendation format
  termination
  reference letter
  letter of introduction
  termite bond
  a4 paper
  business letter
  signature
  legal paper size
  cover letter
  employment agreement
  introduction
  alphabet
  opinion letter
  crucible
  no cover letter
  pre-approval letter

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

Other search terms related to letter and their ratings are:
★★★★★ enclosure
★★★★ cc
★★★ resume
★★★ prejudice
★★★ salary requirements
★★★ name
★★ attachment
★★ enclosures
★★ notice
★★ examples
★ prejudice example
★ salary requirement
★ cv
★ salary history
★ salary requirements sample
prejudice save as to costs
cause
prejudice template
You have in mind a companion for letter and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of letter in all years. Click on graph for more.
letter
email
memo