I need help with Synonyms/Antonyms?

Cauterize, and the words are sear, shave, sensitize, warn..which would be the synonyms?...Amnesia, and the words are sensation, indifference, memory, lethargy..which would be the antonyms?...Program, and the words are factor, constituent, schedule, dissaray which would be the synonyms...Telegram: is newspaper a synonym?