slider vs sledder

slider and sledder both are nouns.

Word	Noun	Adjective	Verb	Adverb
slider	Yes	No	No	No
sledder	Yes	No	No	No

As nouns, sledder is a hypernym of slider; that is, sledder is a word with a broader meaning than slider:

slider (noun)	sledder (noun)
a fastball that curves slightly away from the side from which it was thrown	someone who rides a sled
freshwater turtle of United States and South America; frequently raised commercially; some young sold as pets
someone who races the luge
a person who slips or slides because of loss of traction