motorway vs pike

motorway and pike both are nouns.

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

As nouns, motorway and pike are synonyms defined as:

Other synonyms of motorway include expressway, freeway, state highway, superhighway, throughway, thruway.

motorway (noun)	pike (noun)
a broad highway designed for high-speed traffic	any of several elongate long-snouted freshwater game and food fishes widely distributed in cooler parts of the Northern Hemisphere
	medieval weapon consisting of a spearhead attached to a long pole or pikestaff; superseded by the bayonet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