unit vs totality

unit and totality both are nouns.

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

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

unit (noun)	totality (noun)
an assemblage of parts that is regarded as a single entity	the whole amount
a single undivided whole	the quality of being complete and indiscriminate
an organization regarded as part of a larger social group	the state of being total and complete
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