As nouns the difference between ees and efs
is that ees is (rare) , the name of the letter e while efs is event-free survival.
ees
English
Noun
(head)
(rare) , the name of the letter E.
Anagrams
*
*
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efs
English
Noun
(head)
, the name of the letter F.
Anagrams
*
*