- ...it should be ... called "bobsled". "Bobsleigh" isn't even given as an alternative in the dictionary.
- "Sleigh" is a "light vehicle mounted on runners for use on snow or ice, having one or more seats and usually drawn by a horse"...
Like
sled and 'sledge',
sleigh can also be a verb, meaning to ride (on) a sled (sic), although, in the case of
sledge, that would be ‘transport in a sleigh’... I hope you get the drift, and won’t be stuck in this synonymic equivalent!
Btw, you may need some
redirection: Bob’s definitely associated with both
sled and
sleigh, although in the latter case, not verb-ally. Curiously, he’s not into
sledges at all; perhaps that combination holds a bad connotation for him...