Synonyms of the word 
UNTAPPED → UNDEVELOPED - UNEXPLOITED
untapped
- adj. Not tapped.
undeveloped
- adj. not developed or used.
- adj. not built on, unbuilt; not ready for building on.
- adj. lagging behind others, especially in economic or social matters.
unexploited
- adj. Not exploited.
If you are interested in words, visit the following sites :
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