Point 1: Nature.
\emph{Shares} represent owners’ capital; shareholders are owners.
\emph{Debentures} represent loan capital; debenture holders are creditors.
Point 2: Return and priority.
\emph{Dividend} on shares is paid only out of profits and is an \emph{appropriation}.
\emph{Interest} on debentures is a \emph{charge} against profits—payable even if profits are inadequate; debenture holders have priority over shareholders.
Point 3: Repayment.
\emph{Share capital} is normally not repayable during life of the company.
\emph{Debentures} carry a fixed maturity (redeemable).
Point 4: Security/voice.
Shareholders may vote; debenture holders do not. Debentures may be secured by charge on assets.
Final Answer:
\[
\boxed{\text{Shares: ownership & dividend (appropriation). Debentures: loan & interest (charge).}}
\]
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