sevensome vs septet

sevensome and septet both are nouns.

Word	Noun	Adjective	Verb	Adverb
sevensome	Yes	No	No	No
septet	Yes	No	No	No

As nouns, sevensome and septet are synonyms defined as:

Other synonyms of sevensome include septette.

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