advance has 43 distinct synonyms spread across 18 of its 20 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 3 recorded opposites are recede, back, retreat.
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.
increase or raise
“boost the voltage in an electrical circuit”
obtain advantages, such as points, etc.
“The home team was gaining ground”
develop further
“We are advancing technology every day”
pay in advance
“Can you advance me some money?”
a movement forward
“he listened for the progress of the troops”
a tentative suggestion designed to elicit the reactions of others
“she rejected his advances”
the act of moving forward (as toward a goal)
Synonyms, antonyms and the broader and narrower relations for advance come from Princeton University’s WordNet. Full sources and licences.