Question

is antimatter and nonmatter are same? ​

Answer 1

no they are also different.

because........

Matter is the stuff you are made of. Antimatter is the same as matter in every way, looks the same, behaves the same, except its particles have electrical charges opposite to matter. E.g., our electrons are negatively charged, whereas a positron (an antimatter "electron") is positively charged.

Answer 2

Antimatter is the same as matter in every way, looks the same, behaves the same, except its particles have electrical charges opposite to matter.