As nouns the difference between twinner and climber
is that twinner is one who gives birth to twins; a breeder of twins while climber is one who climbs.
As a verb climber is
to climb; to mount with effort; to clamber.
climber
English
Etymology 1
(climb)
Noun
(
en noun)
One who climbs.
A plant that climbs, such as a vine.
A bird that climbs, such as a woodpecker or a parrot.
Derived terms
* social climber
Etymology 2
From climb; compare clamber.