1. all-or-none_law

noun. (neurophysiology) a nerve impulse resulting from a weak stimulus is just as strong as a nerve impulse resulting from a strong stimulus.

Rhymes with Or Else

2. all-or-nothing

adjective. occurring completely or not occurring at all.

3. life-or-death

adjective. vitally important.

4. hit-or-miss

adjective. dependent upon or characterized by chance.

5. all-or-none

adjective. occurring completely or not occurring at all.

6. do-or-die

adjective. desperately determined.

7. OR

noun. a room in a hospital equipped for the performance of surgical operations.

8. OR

noun. a state in northwestern United States on the Pacific.