From Dr. Bill, this link to Richard Lederer's page on words containing their own synonyms. The letters can be separated, but must be in order.

http://www.jewishworldreview.com/0802/lederer080802.asp

This seems a little stretched:
[quote]I have also spotted two kangaroos that carry a joey and its antonym:
*encourage transports urge and enrage

Enrage as an antonym of urge?

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]

perambulate - ramble, amble

Kangaroo Words is a great link for reference

Isn'i that the very link that began this thread?

Just emphasizing it's a great reference.