sextuplet vs sixer

sextuplet and sixer both are nouns.

Word	Noun	Adjective	Verb	Adverb
sextuplet	Yes	No	No	No
sixer	Yes	No	No	No

As nouns, sextuplet and sixer are synonyms defined as:

sextuplet and sixer: the cardinal number that is the sum of five and one

Other synonyms of sextuplet include 6, Captain Hicks, half a dozen, hexad, sestet, sextet, sise, six, VI.

sextuplet (noun)	sixer (noun)
the cardinal number that is the sum of five and one	the cardinal number that is the sum of five and one