14 entries under mouth topic. ×

11
gulf(noun, sound, arm, sea)
7
estuary(noun, sound, opening, box, entrance)
6
bight(noun, sound, arm, harbor)
6
fjord(noun, sound, channel, outlet)
5
bayou(noun, sound, arm, bay)
5
sound(noun, channel, bay, harbor)
4
arm(noun, sound, water, channel)
4
creek(noun, sound, arm, channel, bay)
4
strait(noun, sound, channel, haven)
1
anchorage(noun, sound, arm, harbor)
1
slough(noun, sound, retreat, bay)
0
basin(noun, sound, arm, haven)
0
channel(noun, sound, outlet, waterway)
0
delta(noun, opening, box, passage, entrance)
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APASmart Define. (2015). firth thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/firth/thesaurus/synonyms
ChicagoSmart Define. 2015. "firth thesaurus" https://smartdefine.org/firth/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2015, firth thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/firth/thesaurus/synonyms>.
MLASmart Define. "firth thesaurus" 10 April 2015. Web. 24 September 2026. <https://smartdefine.org/firth/thesaurus/synonyms>