the antonym of robot is human.
There would not be an antonym for equipment.
scaffold is a noun so there is no antonym.
The antonym of durable is flimsy or ephemeral.
steal is a common antonym for invent. possibly thief or copy-cat.
Failure.
success
failure loss
Antonyms for "achievement" include "defeat" and "failure".
A synonym for victory is conquest. An antonym for victory is defeat.
Decline.
Thesaurus online lists:stagnationsamenessdecreasewithdrawalsimilarityuniformityagreementfailure
No, it's not even a synonym. Antonym means opposite. Some antonyms for victory would be: failure, forfeit, defeat or loss.
Achievement is a strange word to have an antonym, but according to my dictionary it says defeat, failure, forfeit, injury, miscue, misfortune, neglect and negligence.
The antonym I use for excel is "fall behind", the closest definition I can come up with. Mrs. Ramirez, 6th grade teacher
Since luck means good fortune, an antonym would be misfortune. Other antonyms could be failure, bad luck or disadvantage.
The antonym of the word 'synonym' is 'antonym'.