blood has 17 distinct synonyms spread across 2 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.
the fluid (red in vertebrates) that is pumped through the body by the heart and contains plasma, blood cells, and platelets
“blood carries oxygen and nutrients to the tissues and carries away waste products”
temperament or disposition
“a person of hot blood”
people viewed as members of a group
“we need more young blood in this organization”
smear with blood, as in a hunting initiation rite, where the face of a person is smeared with the blood of the kill
Synonyms, antonyms and the broader and narrower relations for blood come from Princeton University’s WordNet. Full sources and licences.