taxi fare vs transportation

taxi fare and transportation both are nouns.

Word	Noun	Adjective	Verb	Adverb
taxi fare	Yes	No	No	No
transportation	Yes	No	No	No

As nouns, transportation is a hypernym of taxi fare; that is, transportation is a word with a broader meaning than taxi fare:

Other hypernyms of taxi fare include fare.

taxi fare (noun)	transportation (noun)
the fare charged for riding in a taxicab	the act of moving something from one location to another
	the commercial enterprise of moving goods and materials
	the act of expelling a person from their native land
	a facility consisting of the means and equipment necessary for the movement of passengers or goods
	the sum charged for riding in a public conveyance