actually there are a few words that are their own antonyms, also the term for that is contronyms:
here's a list from
Fun With Words: Contronyms
anabasis - military advance, military retreat
apology - admission of fault in what you think, say, or do; formal defense of what you think, say, or do
aught - all, nothing
bolt - secure, run away
by - multiplication (e.g., a three by five matrix), division (e.g., dividing eight by four)
chuffed - pleased, annoyed
cleave - separate, adhere
clip - fasten, detach
consult - ask for advice, give advice
copemate - partner, antagonist
custom - usual, special
deceptively smart - smarter than one appears, dumber than one appears
dike - wall, ditch
discursive - proceeding coherently from topic to topic, moving aimlessly from topic to topic
dollop - a large amount, a small amount
dust - add fine particles, remove fine particles
enjoin - prescribe, prohibit
fast - quick, unmoving
first degree - most severe (e.g., murder), least severe (e.g., burn)
fix - restore, castrate
flog - criticize harshly, promote aggressively
garnish - enhance (e.g., food), curtail (e.g., wages)
give out - produce, stop production
grade - incline, level
handicap - advantage, disadvantage
help - assist, prevent (e.g., "I can't help it if...")
left - remaining, departed from
liege - sovereign lord, loyal subject
mean - average, excellent (e.g., "plays a mean game")
off - off, on (e.g., "the alarm went off")
out - visible (e.g., stars), invisible (e.g., lights)
out of - outside, inside (e.g., "work out of one's home")
oversight - error, care
pitted - with the pit in, with the pit removed
put out - extinguish, generate (e.g., something putting out light)
quiddity - essence, trifling point
quite - rather, completely
ravel - tangle, disentangle
rent - buy use of, sell use of
rinky-dink - insignificant, one who frequents RinkWorks
sanction - approve, boycott
sanguine - hopeful, murderous (obsolete synonym for "sanguinary")
screen - show, hide
seed - add seeds (e.g., "to seed a field"), remove seeds (e.g., "to seed a tomato")
skinned - with the skin on, with the skin removed
strike - hit, miss (in baseball)
table - propose (in the United Kingdom), set aside (in the United States)
transparent - invisible, obvious
unbending - rigid, relaxing
variety - one type (e.g., "this variety"), many types (e.g., "a variety")
wear - endure through use, decay through use
weather - withstand, wear away
wind up - end, start up (e.g., a watch)
with - alongside, against
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Microsoft, the leader in using innovative tactics to promote irksome experience, coupled with antiquated technology that's held together by a pyramid of makeshift afterthoughts.
Apple, the leader in using irksome tactics to promote innovative experience, coupled with an antiquated core that's enhanced by state-of-the-art afterthoughts.
Linux, the leader in not using any tactics to promote user-defined experience, coupled with state-of-the-art core enhanced by innovative afterthoughts.
