whole vs unit

whole and unit both are nouns.

Word	Noun	Adjective	Verb	Adverb
whole	Yes	Yes	No	Yes
unit	Yes	No	No	No

As nouns, whole and unit are synonyms defined as:

whole and unit: an assemblage of parts that is regarded as a single entity

As nouns, unit is a hyponym of whole; that is, unit is a word with a more specific, narrower meaning than whole:

Other hyponyms of whole include compound, complex, composite.

whole (noun)	unit (noun)
an assemblage of parts that is regarded as a single entity	an assemblage of parts that is regarded as a single entity
all of something including all its component elements or parts	a single undivided whole
	an organization regarded as part of a larger social group
	a single undivided natural thing occurring in the composition of something else
	any division of quantity accepted as a standard of measurement or exchange
	an individual or group or structure or other entity regarded as a structural or functional constituent of a whole

whole (adjective)	unit (adjective)
including all components without exception; being one unit or constituting the full amount or extent or duration; complete
(of siblings) having the same parents
exhibiting or restored to vigorous good health
acting together as a single undiversified whole
not injured or harmed

whole (adverb)	unit (adverb)
to a complete degree or to the full or entire extent; Completely or entirely