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Co- + T9.

Also, cotinines.

Two (or more) words that share the same key-taps in the T9 dictionary in mobile phones.

WEAK is a cotinine of ZEAL.
Typical SMS conversation :

Guy 1 : "These guys are giving away free beer here."

Guy 2 : "Get me some bras !"

Guy 2 : "I meant asap :( Sorry about the cotinine"
by Gulab March 27, 2010
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