rouble

As a letter s

is the letter s with a.

As a verb rouble is

.

As verbs the difference between rouble and trouble

is that rouble is while trouble is .

As nouns the difference between double and rouble

is that double is twice the number, amount, size, etc while rouble is an alternative spelling of lang=en.

As an adjective double

is made up of two matching or complementary elements.

As an adverb double

is twice over; twofold.

As a verb double

is to multiply by two.