Synonyms of the word 
UNFLINCHING → FEARLESS - UNAFRAID - UNBLINKING - UNINTIMIDATED - UNSHRINKING
unflinching
- adj. without flinching; staying committed despite any difficulty; steadfast.
fearless
- adj. Without fear.
unafraid
- adj. Not afraid.
unblinking
- adj. Not blinking.
unintimidated
- adj. Not intimidated.
unshrinking
- adj. Not shrinking.
If you are interested in words, visit the following sites :
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- 1word.ws/unflinching to play with words, suffixs, prefixs, etc.