skate vs Rollerblade

skate and Rollerblade both are nouns.

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

As verbs, Rollerblade is a hyponym of skate; that is, Rollerblade is a word with a more specific, narrower meaning than skate:

skate: move along on skates
Rollerblade: travel on shoes with a single line of rubber wheels attached to their soles

Other hyponyms of skate include ice skate, figure skate, roller skate, skateboard.

skate (noun)	Rollerblade (noun)
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	(trademark) an in-line skate
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

skate (verb)	Rollerblade (verb)
move along on skates	travel on shoes with a single line of rubber wheels attached to their soles