/ Thesaurus / R Synonyms of rudolf christian karl diesel Find synonyms for: Noun1. Diesel, Rudolf Diesel, Rudolf Christian Karl Dieselusage: German engineer (born in France) who invented the diesel engine (1858-1913)WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: blithesome Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language