embarrassment has 3 distinct synonyms spread across 1 of its 4 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 disembarrassment.
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 shame you feel when your inadequacy or guilt is made public
the state of being embarrassed (usually by some financial inadequacy)
“he is currently suffering financial embarrassments”
some event that causes someone to be embarrassed
“the outcome of the vote was an embarrassment for the liberals”
extreme excess
“an embarrassment of riches”
Synonyms, antonyms and the broader and narrower relations for embarrassment come from Princeton University’s WordNet. Full sources and licences.