Onescore is a related term of twoscore.
As a noun twoscore
is forty.
As a numeral onescore is
twenty 20.
onescore
English
Numeral
(head)
(archaic, rare) Twenty]] .
Related terms
* twoscore, threescore, fourscore, fivescore, sixscore, sevenscore, eightscore, ninescore, tenscore