Synonyms for soy Found 8 synonyms across 3 meanings for “soy”. a source of oil (noun) soybean erect bushy hairy annual herb having trifoliate leaves and purple to pink flowers (noun) soyasoja thin sauce made of fermented soy beans (noun) Explore Related Words Rhymes with soySynonyms for soybeanSynonyms for soyaSynonyms for soja Synonym Finder | Rhyme Finder | Poetry Editor