The best replacement for packet is frame.

The best alternatives to packet are rated as following:
★★★★★  frame
★★★★★  package
★★★★  circuit switching
★★  datagram
★  pack
★  packette
★  parcel
★  large letter
★  pacific seacraft
★  sao
★  segment
★  sub packet
  circuit
  tcp packet
  circuit switched
  udp packet

Your alternative for packet is not listed? Suggest!
Speaking about packet, one probably shouldn't forget about corned beef.

Other search terms related to packet and their ratings are:
★★★★★ corned beef
★ associated connection
You have in mind a companion for packet and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of packet in all years. Click on graph for more.
packet
frame
package