taponym 

Any two words spelled the same way when using T9

'Please don't call the suicide hotlines, I meant to say I'm not home yet. Good and home are taponyms.'

taponym by bobshush June 4, 2009

typonym 

Analogous to synonym, typonyms are words that sound and mean the same but are spelled differently due to typographical error.

"Friend", "comrade" and "buddy" are synonyms while "friend", "firend" and "friedn" are typonyms.

typonym by whirlwind June 13, 2005

typonym 

A word that would be the same as another word if spelled without typographical error. This word is becoming increasingly relevant with the widespread usage of instant messaging services and rushed emails. When reading messages written in a hurry, one is alert for all words as well as their typographical counterparts.

The word 'answer', skimmed over quickly, could be mistaken for the word 'andrew'.

typonym by Andrew Tam July 19, 2008