Synonyms

Looking for a synonym of "surya" (sun), Deepika thinks "chaand" (moon) is also a correct answer, since both shine in the sky. Her brother says this is wrong. Who is right?

Looking for a synonym of "jal" (water), Rohit recalls the word "anal" and thinks it is correct because it sounds similar to "jal". His sister says it is something completely different. Who is right?

Asked for a synonym of "parvat" (mountain), Aryan thinks "maidan" (plain) is also correct, since both are geography words. His teacher says the two are actually opposites of each other. Who is right?

Asked for a synonym of "andhkar" (darkness), Sonal answers "prakash" (light), recalling it as a familiar word associated with "andhkar". Her friend says this is the wrong answer, even though the word is familiar. Who is right?