We found one dictionary that defines the word source as a semantic role:

Art (1 matching dictionary)

1. Linguistic Glossary (No longer online)

▸ Words similar to source as a semantic role ▸ Usage examples for source as a semantic role ▸ Idioms related to source as a semantic role ▸ Wikipedia articles (New!) ▸ Words that often appear near source as a semantic role ▸ Rhymes of source as a semantic role ▸ Invented words related to source as a semantic role