As adjectives the difference between unconquerable and indefeasible
is that unconquerable is not conquerable; indomitable while indefeasible is not liable to being annulled or declared void.
unconquerable
English
Adjective
(-)
Not conquerable; indomitable.
References
*
*
indefeasible
English
Adjective
(head)
not liable to being annulled or declared void.
Antonyms
* defeasible