sledder vs slider

sledder and slider both are nouns.

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

As nouns, slider is a hyponym of sledder; that is, slider is a word with a more specific, narrower meaning than sledder:

Other hyponyms of sledder include luger, tobogganist.

sledder (noun)	slider (noun)
someone who rides a sled	a fastball that curves slightly away from the side from which it was thrown
	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