Synonyms for Conceivable:

adj.

all (adjective)
imaginable.
operable (adjective)
doable.
possible (adjective)
imaginable, possible, potential, feasible.
promising (adjective)
potential.
reasonable (adjective)
sensible, logical, likely, sound, rational, wise, plausible, thinking, deductive, cogent, thought-out, intelligent, feasible, inductive, reasonable.
reasonable, easy to understand (adjective)
likely, believable, thinkable, mortal, possible, imaginable, convincing, earthly.

n.

doable, attainable, practicable, viable, in principle, may, be able to do something. earthly, humanly possible, mortal. conceivable (noun)
imaginable, thinkable, possible.
understandable (noun)
convincing, believable.

Other synonyms:

mortal. imaginable
earthly.
Other relevant words:
believable, doable, earthly, humanly possible, attainable, practicable, viable, may, thinkable, mortal, convincing.

Usage examples for conceivable

  1. As in Africa, it is all trees trees, trees with no other world conceivable so is it here- it is all vice and poverty and crime. – In-Darkest-England-and-the-Way-Out by Booth, William
  2. Its activities reach out in all directions and touch almost every conceivable need. – The American Church Dictionary and Cyclopedia by William James Miller
  3. It is also very conceivable that the good news might be conveyed to those worlds by angels, just as the good news is made known in our world by men. – Love's Final Victory by Horatio