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The relationship between two words which have exactly the same keystroke series when texting while using a predictive text program.

They are distinctly different from words which interchange simply due to a typo and auto incorrect.
Girl in text: Good night! Love you!
Guy in text back: Hoof night! Knud you tom!
Girl in text: Oh T9onyms! Like a secret code! You're so funny!

Mom in text: When will you be good?
Son in text: What? ...Always?
Mom in text: Don't tall back! Bond gone nox!
Son in text: I think you are having a T9onym attack...
T9onym by KRA2008 June 23, 2011
Related Words

Thonymar 

Thonymar is the best
Thonymar by Thonymar February 16, 2022

T9nonym(s) 

Two words having the same numerical code on a telephone dialing pad. Most commonly found in text messages while using T9.
The words "if" and "he" are T9nonym(s); as well as, "me" and "of".
T9nonym(s) by Dr. Sweet August 11, 2008

tonymaster21 

a very og username
hey tonymaster21, you are very og
tonymaster21 by tonymaster21 September 3, 2016

tonymartins 

An extremely handsome, caring guy. Amazing husband material, loving and sweet. "Tonymartins" have great listening skills, and will lay around with you for hours. Will write sweet notes, and never forget an anniversary or birthday. Capable of making even the worst days better, and cute enough to kiss, he is the best kind of guy.

As a friend, they are the most fun to be around. Can talk about anything with them for hours, and never get bored. Very loyal, and always willing to help out.

A Tony is a very independent, strong-willed guy with a good heart and a smile on his chiseled jawline. He's optimistic and cheerful, and has a beautiful smile.

Any girl would be LUCKY to get a Tonymartins.
He is so sweet like a tonymartins.
tonymartins by MartoniC February 5, 2020

Tonymartin427 

A small creator on tiktok that Is known for making meme videos on tiktok
"Hey look at this funny video tonymartin427 made"
Tonymartin427 by Tonymartin427 April 24, 2022