speed skate vs skate

speed skate and skate both are nouns.

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

speed skate (noun)	skate (noun)
an ice skate with a long blade; worn for racing	large edible rays having a long snout and thick tail with pectoral fins continuous with the head; swim by undulating the edges of the pectoral fins
	sports equipment that is worn on the feet to enable the wearer to glide along and to be propelled by the alternate actions of the legs

speed skate (verb)	skate (verb)
race on skates	move along on skates