In context|obsolete|transitive|lang=en terms the difference between shift and one
is that
shift is {{context|obsolete|transitive|lang=en}} to change (one's clothes); also to change (someone's) underclothes while
one is {{context|obsolete|transitive|lang=en}} to cause to become one; to gather into a single whole; to unite.
In context|us|lang=en terms the difference between shift and one
is that
shift is (us) the gear mechanism in a motor vehicle while
one is (us) a one-dollar bill.
As verbs the difference between shift and one
is that
shift is to change, swap while
one is {{context|obsolete|transitive|lang=en}} to cause to become one; to gather into a single whole; to unite.
As nouns the difference between shift and one
is that
shift is (historical) a type of women's undergarment, a slip while
one is (mathematics) the neutral element with respect to multiplication in a [[ring#etymology_3|ring]].
As a numeral one is
(cardinal) a numerical value equal to [[1]]; 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
(impersonal pronoun) one thing (among a group of others); one member of a group.
As a adjective one is
of a period of time, being particular; as, one morning, one year.