The spelling of the word "roomers" can be a bit confusing for English learners. It is pronounced as /ˈruːmərz/ and refers to people who live in a rented room or lodging. The confusion arises as the pronunciation ends with an "s" sound, but the word is spelled with -er suffix. This is because "roomer" is actually a noun derived from the verb "to room", meaning to rent a room. The -er suffix is added to form a noun denoting a person who performs the action.
* The statistics data for these misspellings percentages are collected from over 15,411,110 spell check sessions on www.spellchecker.net from Jan 2010 - Jun 2012.