ogdoad vs eighter

ogdoad and eighter both are nouns.

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

As nouns, ogdoad and eighter are synonyms defined as:

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

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

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