Nouns

(n)laminitis, founderinflammation of the laminated tissue that attaches the hoof to the foot of a horse
(n)founder, beginner, founding father, fathera person who founds or establishes some institution“George Washington is the father of his country”
(n)foundera worker who makes metal castings

Verbs

(v)fall through, fall flat, founder, flopfail utterly; collapse“The project foundered”
(v)foundersink below the surface
(v)collapse, fall in, cave in, give, give way, break, founderbreak down, literally or metaphorically“The wall collapsed”, “The business collapsed”, “The dam broke”, “The roof collapsed”, “The wall gave in”, “The roof finally gave under the weight of the ice”
(v)founderstumble and nearly fall“the horses foundered”