"In two away games, at Norwich and here, with a little bit of luck we could have got something out," Pulis told BBC Sport. "We're disappointed not to get a point.
"It will be our home form that will determine our season and if we show commitment we've shown today, and take our opportunities, we'll give it a good crack.
"I try to generate the spirit and commitment in the dressing that galvanises and pulls people together, and that's what we've tried to do here."
Pulis also reserved special praise for Chamakh, who scored his third goal in as many Premier League games in the loss.
"Marouane Chamakh has been excellent since I walked through the door," he said.
"His attitude and commitment has been excellent. He linked up play today and we played good football when we got it into him."