The striker has thrived during his first season in the top flight, netting 14 times to become the highest-scoring Englishman in the Premier League.
However, Puncheon believes that Lambert does not get enough credit for his all-round game.
"There is so much more to his game than goals," Puncheon told Sky Sports News. "A lot of people don't realise he is a fabulous footballer too.
"He's got great feet, excellent movement and reads the game really well. He's not just a targetman, he's a very intelligent player."
Lambert recently signed a three-year contract extension with Southampton.