backhoe vs power shovel

backhoe and power shovel both are nouns.

Word	Noun	Adjective	Verb	Adverb
backhoe	Yes	No	No	No
power shovel	Yes	No	No	No

As nouns, power shovel is a hypernym of backhoe; that is, power shovel is a word with a broader meaning than backhoe:

backhoe: an excavator whose shovel bucket is attached to a hinged boom and is drawn backward to move earth
power shovel: a machine for excavating

Other hypernyms of backhoe include digger, excavator, shovel.

backhoe (noun)	power shovel (noun)
an excavator whose shovel bucket is attached to a hinged boom and is drawn backward to move earth	a machine for excavating