octonary, octad, ogdoad, octet, cardinal, eighter from Decatur, eighter, viii, nine, seven, more...

one, three, five, seven, nine

octagon, hexagon, heptagon, nonagon, decagon, dodecagon, icosagon, pentagon, more...

twenty, thirty, forty, seventy, fifty, sixty, figure, part, ninety, eighty, aged

two cubed,   tres plus cinco,   quatro y quatro,   cuatro doubled,   four doubled,   zwei quadrupled