speed skate vs ice skate

speed skate and ice skate both are nouns.

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

As nouns, ice skate is a hypernym of speed skate; that is, ice skate is a word with a broader meaning than speed skate:

speed skate (noun)	ice skate (noun)
an ice skate with a long blade; worn for racing	skate consisting of a boot with a steel blade fitted to the sole

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