discouragement has 2 distinct synonyms spread across 1 of its 3 senses. Each sense below keeps its own list, because a synonym belongs to a meaning and not to a word: swapping one sense's substitute into another sense's sentence is how a thesaurus makes writing worse. Its one recorded opposite is encouragement.
Counts are distinct word forms across every sense. A synonym that appears under three senses is counted once here and shown three times below, under each sense it belongs to.
the feeling of despair in the face of obstacles
the expression of opposition and disapproval
the act of discouraging
“the discouragement of petty theft”
Synonyms, antonyms and the broader and narrower relations for discouragement come from Princeton University’s WordNet. Full sources and licences.