26,102words currently have published synonym-style alternatives
90,593searchable synonym connections
350,924published thesaurus relationships of every type
Start with the meaning
Interlinear
Contained between lines; written or inserted between lines already written or printed; containing interlineations; as, an interlinear manuscript, translation, etc.
Open English WordNet places these words in at least one shared synset. They share a lexicalised sense, but context, register and collocation should still be checked before substitution.