1) Claudication 2) Disability of walking 3) Gameness 4) Gimp 5) Gimpiness 6) Horse disease 7) Limping 8) Unconvincing quality 1) Claudication 2) Gameness 3) Gimp 4) Gimpiness 5) Limping 
[equine] Lameness in horses and other equidae is a term used to refer to any number of conditions where the animal fails to travel in a regular and sound manner on all four feet. There are many causes of lameness, which can be broadly grouped into the following categories: ==Diagnosing and treating lameness== Lameness severity is typically ...
• (n.) The condition or quality of being lame; as, the lameness of an excuse or an argument.
Lame'ness noun The condition or quality of being lame; as, the lameness of an excuse or an argument. 
Unevenness in the horses stride when moving
[n] - disability of walking due to crippling of the legs or feet
limping noun disability of walking due to crippling of the legs or feet