You have a 1-ruble coin from the former Soviet Union, but without a date it's not possible to give a value.
The lettering is in the Russian Cyrillic alphabet; "CCCP" transliterates to "USSR" using the equivalent English words, and the denomination is actually "рубль" in Cyrillic letters (р = 'r', у = 'u', б = 'b', л = 'l', 'ь' = modifier indicating a soft consonant)
You cannot tell from the Serial number. You must look at the frame. There will be a logo (star with an arrow for tula arsenal, hammer and sickle in a wreath for izshevsk). The date will be right below this.
Those letters spell wreath.
Those letters can be used to spell "wreath".
These letters can form:aareaweawareearerarawwarwarewewear
Mintmarks (if any) are on the reverse of the coin between the wreath and the letters DO in dollar.
A wreath
Wreath is a noun.
The answer is wreath
is a wreath the thing that is green on doors
a funeral wreath is a Corona
Cunúnă is a Romanian equivalent of 'wreath'.
The plural form of "wreath" is "wreaths."