8 vs octet

8 and octet both are nouns.

Word	Noun	Adjective	Verb	Adverb
8	Yes	Yes	No	No
octet	Yes	No	No	No

As nouns, 8 and octet are synonyms defined as:

Other synonyms of 8 include eight, eighter, eighter from Decatur, octad, octonary, ogdoad, VIII.

8 (noun)	octet (noun)
the cardinal number that is the sum of seven and one	a musical composition written for eight performers
	eight people considered as a unit
	a set of eight similar things considered as a unit
	eight performers or singers who perform together
	the cardinal number that is the sum of seven and one

8 (adjective)	octet (adjective)
being one more than seven