1
interminable
1
interminate
1
limitless
1
measureless
1
no end of(expression, idiom)
1
perpetual
1
puzzling
1
sealed
1
shoreless
1
strange
1
sumless
1
termless
1
unapparent
1
unapprehended
1
unascertained
1
unbeknown
1
unbounded
1
uncharted
1
uncircumscribed
1
unclassified
11 years ago|1.3k views|share |citing 
APASmart Define. (2015). unplumbed thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/unplumbed/thesaurus/synonyms
ChicagoSmart Define. 2015. "unplumbed thesaurus" https://smartdefine.org/unplumbed/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2015, unplumbed thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/unplumbed/thesaurus/synonyms>.
MLASmart Define. "unplumbed thesaurus" 14 April 2015. Web. 28 September 2026. <https://smartdefine.org/unplumbed/thesaurus/synonyms>