more has 4 distinct synonyms spread across 3 of its 5 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 2 recorded opposites are less, fewer.
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.
(comparative of `many' used with count nouns) quantifier meaning greater in number
“a hall with more seats”
used to form the comparative of some adjectives and adverbs
“more interesting”
comparative of much; to a greater degree or extent
“he works more now”
English statesman who opposed Henry VIII's divorce from Catherine of Aragon and was imprisoned and beheaded; recalled for his concept of Utopia, the ideal state
Synonyms, antonyms and the broader and narrower relations for more come from Princeton University’s WordNet. Full sources and licences.