Contentious rhymes with:
pretentious, unpretentious, conscientious, pretentious, tendentious, unpretentious, conscientious, conscious, pretentious, subconscious, tendentious, unconscious, unpretentious
Contentious sounds like:
cohentannoudji, comandantes, commandments, commitments, condiments, contaminants, contaminates, contends, contents, continent's, continents