As nouns the difference between bedder and tedder
is that bedder is agent noun of bed; one who beds while tedder is a machine for stirring and spreading hay, to expedite its drying.
As a verb tedder is
.
bedder
Noun
(
en noun)
Agent noun of bed; one who beds.
(British) A bedmaker; a maid.
tedder
English
Etymology 1
Noun
(
en noun)
A machine for stirring and spreading hay, to expedite its drying.
Etymology 2