[1] : WordNet (r) 2.0

make possible
     v : make accessible; "this answer opens the door to new
         objections"

[2] : Moby Thesaurus II by Grady Ward, 1.0

19 moby thesaurus words for "make possible":
   ok, accord, admit, allow, consent, dispense, enable, give leave,
   give permission, give the go-ahead, give the word, grant, leave,
   let, okay, permit, release, say the word, vouchsafe

Make >> M Words
Make, definition of term: Make
make_pag1.html

Make Easier >> M Words
Make Easier, definition of term: Make Easier
make+easier_pag1.html

Make Good >> M Words
Make Good, definition of term: Make Good
make+good_pag1.html

Make For >> M Words
Make For, definition of term: Make For
make+for_pag1.html

Make Drunk >> M Words
Make Drunk, definition of term: Make Drunk
make+drunk_pag1.html

Make Do >> M Words
Make Do, definition of term: Make Do
make+do_pag1.html

Make Clear >> M Words
Make Clear, definition of term: Make Clear
make+clear_pag1.html

Make A Mistake >> M Words
Make A Mistake, definition of term: Make A Mistake
make+a+mistake_pag1.html

Make Fun Of >> M Words
Make Fun Of, definition of term: Make Fun Of
make+fun+of_pag1.html