ruminant has no recorded synonym. 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 nonruminant.
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.
any of various cud-chewing hoofed mammals having a stomach divided into four (occasionally three) compartments
Synonyms, antonyms and the broader and narrower relations for ruminant come from Princeton University’s WordNet. Full sources and licences.
related to or characteristic of animals of the suborder Ruminantia or any other animal that chews a cud
“ruminant mammals”