verbal typo

[neil]

from www.urbandictionary.com

1. verbal typo

A verbal typo is the result of a well meaning person trying to say something
coherent but tripping over his or her own mouth in the attempt. Generally, a
verbal typo is similar in appearance to the intended word when written down,
but when spoken it sounds twisted and often hilarious.

Combarst is a verbal typo of combust

Source: BigGoofyGuy, Apr 10, 2005