pike vs highway

pike and highway both are nouns.

Word	Noun	Adjective	Verb	Adverb
pike	Yes	No	No	No
highway	Yes	No	No	No

As nouns, highway is a hypernym of pike; that is, highway is a word with a broader meaning than pike:

Other hypernyms of pike include main road.

pike (noun)	highway (noun)
any of several elongate long-snouted freshwater game and food fishes widely distributed in cooler parts of the Northern Hemisphere	a major road for any form of motor transport
medieval weapon consisting of a spearhead attached to a long pole or pikestaff; superseded by the bayonet
a broad highway designed for high-speed traffic
a sharp point (as on the end of a spear)
highly valued northern freshwater fish with lean flesh