nail-biter
noun
nail-bit·er ˈnāl-ˌbī-tər 
: something (such as a close contest) that induces tension or anxiety
nail-biting
ˈnāl-ˌbī-tiŋ
adjective 
Synonyms
- cliff-hanger
- hair-raiser
- suspenser
- thriller
See all Synonyms & Antonyms 
Word History
First Known Use
1950, in the meaning defined above
nail-biter
noun
as in thriller
something (as a close contest) that induces much suspense as to its outcome a presidential election that was one of the great nail-biters of all time Synonyms & Similar Words
Relevance
- thriller
- suspenser
- cliff-hanger
- hair-raiser
- squeaker
- photo finish
Antonyms & Near Antonyms
- blowout
- yawner