high spot vs item

high spot and item both are nouns.

Word	Noun	Adjective	Verb	Adverb
high spot	Yes	No	No	No
item	Yes	No	No	Yes

As nouns, item is a hypernym of high spot; that is, item is a word with a broader meaning than high spot:

Other hypernyms of high spot include detail, particular.

high spot (noun)	item (noun)
the most interesting or memorable part	a whole individual unit; especially when included in a list or collection
	an isolated fact that is considered separately from the whole
	a distinct part that can be specified separately in a group of things that could be enumerated on a list
	an individual instance of a type of symbol
	a small part that can be considered separately from the whole

high spot (adverb)	item (adverb)
	(used when listing or enumerating items) also