As nouns the difference between one and dos
is that
one is (mathematics) the neutral element with respect to multiplication in a while
dos is can, tin.
As a numeral one
is (cardinal) a numerical value equal to ; the first number in the set of natural numbers (especially in number theory); the cardinality of the smallest nonempty set ordinal: first.
As a pronoun one
is (
lb) one thing (among a group of others); one member of a group.
As an adjective one
is of a period of time, being particular; as, one morning, one year.
As a verb one
is (obsolete|transitive) to cause to become one; to gather into a single whole; to unite.