investment has 3 distinct synonyms spread across 3 of its 6 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. WordNet records no antonym for it — antonymy is a relation between word forms rather than concepts, so it is deliberately sparse.
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.
money that is invested with an expectation of profit
the commitment of something other than money (time, energy, or effort) to a project with the expectation of some worthwhile result
“this job calls for the investment of some hard thinking”
the act of putting on robes or vestments
the ceremonial act of clothing someone in the insignia of an office; the formal promotion of a person to an office or rank
Synonyms, antonyms and the broader and narrower relations for investment come from Princeton University’s WordNet. Full sources and licences.