inglorious has 5 distinct synonyms spread across 1 of its 2 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 glorious.
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.
(used of conduct or character) deserving or bringing disgrace or shame
“Man...has written one of his blackest records as a destroyer on the oceanic islands”
not bringing honor and glory
“some mute inglorious Milton here may rest”
Synonyms, antonyms and the broader and narrower relations for inglorious come from Princeton University’s WordNet. Full sources and licences.