eighter vs octonary

eighter and octonary both are nouns.

Word	Noun	Adjective	Verb	Adverb
eighter	Yes	No	No	No
octonary	Yes	No	No	No

As nouns, eighter and octonary are synonyms defined as:

eighter and octonary: the cardinal number that is the sum of seven and one

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

eighter (noun)	octonary (noun)
the cardinal number that is the sum of seven and one	the cardinal number that is the sum of seven and one