I have just been looking at this old thread. There are a surprising number of other "kangaroo words". Here is another containing both a synonym and an antonym:

fabrication fiction [synonym]
fabrication fact [antonym]

Other kangaroo words I have come up with:

ungainly ugly
cornet cone
gigantic giant
traitor rat
indolent idle
stellar star
discourteous curt
median mean
regulate rule
education Eton
routine rote
enthusiast nut
eliminate mate (in chess)
Wordsmith wit, worth

absorbing boring [antonym]