Hello Everyone,
I’m talking to my kids and we were using the terms double, triple and quadruple. Then they asked me if there a word for multiplying something by five. Is there?
There’s plenty more where that came from.
Also consider teaching them primary, secondary, tertiary, quaternary, and more.
Or you could be a terrible parent and tell them it’s “pentify”. Then watch them go through life generating perplexity where’er they tread.
I always say that since words like quintuple are really just Latin prefixes for the numbers, we should just use English versions like twople, threeple, fourple, fiveple and so on. This is handy, because nobody ever remembers the Latin for multipliers two-hundred-twelveple. 
I like to use use oneth and twoth in place of first and second, just to amuse myself.
Yet, that same site tells us that there is no next word in the series: once, twice, thrice.
Interesting site to poke around. We need to point it out to Reza.
??? Not “onest”, “twond”, “threerd”, . . . ?
That would be multiplying by 4.9999999. 
We need to start using the force.
What are there, like eleventy different number series in English?
Quint
Five over par.
:smack:
Umpteen, at least.
Fivefold?
You might also talk to them about plane shapes - triangle, square, pentagon, hexagon etc etc. Then of course the platonic solid shapes - Tetrahedron, cube, octahedron, dodecahedron… It’s fun to make them: Platonic Solids - EnchantedLearning.com
As far as I can recall there are four number series in English:
Cardinal numbers: one, two, three, etc
Ordinal numbers: first, second, third, etc
Multiple numbers: once, twice, thrice
Distributive numbers: unary, binary, trinary, etc
I’d be grateful if any math guys would step in and correct this if needed.
Well, of course, the set the started the OP:
single, double, triple, [del]home run[/del] quadruple, etc.
And what about primary, secondary, tertiary, quaternary, quinary, etc.?
You mean bicentidodecuple ? I use it every day !
No I don’t
Or you could just like go with the joke too, that works.