Open English Wordnet
Nouns
(n)contrast, direct contrastthe opposition or dissimilarity of things that are compared“in contrast to”, “by contrast”
(n)line, dividing line, demarcation, contrasta conceptual separation or distinction“there is a narrow line between sanity and insanity”
Verbs
(v)contrast, counterpointto show differences when compared; be different“the students contrast considerably in their artistic abilities”