sidecar vs cocktail

sidecar and cocktail both are nouns.

Word	Noun	Adjective	Verb	Adverb
sidecar	Yes	No	No	No
cocktail	Yes	No	No	No

As nouns, cocktail is a hypernym of sidecar; that is, cocktail is a word with a broader meaning than sidecar:

sidecar (noun)	cocktail (noun)
conveyance consisting of a small carrier attached to the side of a motorcycle	a short mixed drink
a cocktail made of orange liqueur with lemon juice and brandy	an appetizer served as a first course at a meal