Your question is oddly phrased. If you would like to know 5 familiar words, these would include a, the, is, I, and at. Those five are quite familiar.
Quatrain.
quintet quintuplet quins
Four thousand fifty-five.
One and a half. One and five tenths.
mean
The stem "pent" means five. It is often used in words to indicate a quantity or relationship to the number five.
If you mean as currency it is forty-five million dollars.
Eight point five zero percent. Is that what you mean?
Do you mean five letters? That could be "banjo."
The Five-Times when words fail: S.A.F.E.R.
Five words that mean nice are pleasant, good, pretty, handsome, kind, or fine.
8.5022 = eight and five thousand twenty-two ten-thousandths.