FIRTH Antonyms There are 10 antonyms of the word firth. (opposite meanings)Did you mean?Definition of FIRTHSynonyms of FIRTHBest Opposite Words For FIRTHTop 20Top 10 Top 20 (Default)Top 50 Top 100 All All (Default)WordsPhrases All All (Default)Verb Noun Adjective Adverb RankWordSave?Synonyms..UsageType1bayverb, nounv, n2channelverb, nounv, n3estuarynounn4gulfnounn5inletnounn6lakenounn7oceannounn8rivernounn9seanounn10straitnoun, adjectiven, adj Alternatives for BAY Words (5)alcoveembaymentgulflaurelquestPhrases (5)bay laurelbay treetrue laurellaurus nobilissweet bayOpposite words for bay Alternatives for CHANNEL Words (19)groovetransmitcanalcarrychannelisechannelizeconductconveyductgutterimpartlinepassagesidesoundstationstraittransfertransportPhrases (6)communication channeldistribution channelepithelial ducttelevision channeltransmission channeltv channelOpposite words for channel Alternatives for ESTUARY Words (6)armbaycoveinletloughsoundOpposite words for estuary Alternatives for GULF Words (3)abyssdisconnectdisconnectionOpposite words for gulf Alternatives for INLET Words (13)baycanalchannelcovecreekentranceestuaryfjordpassagesoundstraitintakerecessOpposite words for inlet Alternatives for OCEAN Words (1)seaOpposite words for ocean Alternatives for RIVER Words (21)baybayoubeckbightbrookburncanalchannelconfluentcreekestuaryfjordgillinletlagoonrivuletrunnelstreamtributarywatercoursewaterwayOpposite words for river