racing skate vs speed skate

racing skate and speed skate both are nouns.

Word	Noun	Adjective	Verb	Adverb
racing skate	Yes	No	No	No
speed skate	Yes	No	Yes	No

As nouns, racing skate and speed skate are synonyms defined as:

racing skate and speed skate: an ice skate with a long blade; worn for racing

racing skate (noun)	speed skate (noun)
an ice skate with a long blade; worn for racing	an ice skate with a long blade; worn for racing

racing skate (verb)	speed skate (verb)
	race on skates