Out of breath is a term used to describe someone who is having difficulty breathing due to physical exertion. The crossword solutions for this term include WINDED (6 letters), PANTING (7 letters), TIRED (5 letters), PUFFY (5 letters), SPENT (5 letters), PUFFED (6 letters), puffing (7 letters), BREATHLESS (10 letters), shortwinded (11 letters) and shortofbreath (13 letters). All of these words describe someone who is out of breath, either from running, climbing stairs, or any other physical activity that requires a lot of energy.