# RFP vs RMB

> English confusable word pair

## The two words

### RFP
*noun · frequency rank #46,736*
Initialism of request for proposal.

### RMB
*noun · frequency rank #32,565*
Initialism of roadside mailbox: part of a postal system used in rural areas where several houses collect their mail from a cluster of mailboxes at the roadside.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/vs/rfp-vs-rmb