Question

If the word ends in silent e, drop the e and add the suffix, unless the final e is needed to preserve the sound of the preceding consonant (as in vengeance).

Select the two words that both end in the suffix -ence and follow the spelling rule above.

existence
occurrence
interference
condolence
conference

Answer 1

interference and condolence

Both come from verbs that end in a silent e (interfere, condole); the final e is dropped before adding the suffix -ence.