You can see the full category hierarchy on the Category Map.

Loose apronyms:
Perfect Apronyms OnlyAll Apronyms
ATLANTICA Turquiose Liquid, And Not Thick In Consistency Tony McCoy O'Grady
BAYOUBlue As Young Orbison's Uncle Rico Leffanta
BEACHBetween Earth And Curved Horizon Tony McCoy O'Grady
BLUE (4)Blue Lakes. Unbounded Expanses. Charles H. Montgomery, Jr.
Assorted Adjectives:Colours
BRIDGESBusy Road If Deep Gorge's Elaborately Spanned Tony McCoy O'Grady
CASCADECataract As Stream 'Collapses' And Drenches Everything Tony McCoy O'Grady, who can't think of a C word which describes what a waterfall does, but is quite happy with 'collapses'
DELTADepositing Effluvium, Land's Terribly Aqueous Tony McCoy O'Grady
FORDSFor Overcrossing Rivers During Spates Tony McCoy O'Grady
Assorted Verbs
HYTHEHarbour You Thank Heaven Entering Tony McCoy O'Grady
MOATManmade Ocean Around Tower Tony McCoy O'Grady
NIAGARA FALLSNikon Is As Good As Ruined, As Falling Actually Launched Liquid Skyward/Spray Angela Brett
NUDE BEACHNot Undressing Demands Explanation, Bodies Expose Ass-Cheeks Heavenwards Tony McCoy O'Grady, responding to Angela's 'nude genitals' element regarding a crab
OCEANOverflow Can Evaporate Any Navy Rico Leffanta
OCEAN (2)Open Chasm Everyone Always Navigates Jerry Ryan PER Hoboken Elks Lodge #74
OCEAN WORDSOne Cannot 'Encapsulate' Atlantic - Not With-Out "Really Deep Sea" Tony McCoy O'Grady
PACIFICPalms, Atolls, Castaways, Inspiration For Imaginative Children Tony McCoy O'Grady
PONDPaddling Of New Ducklings Angela Brett
RIVERRuns In Various Elongated Routes Niki Widdowson
RUBICONRiver (Utmost Boundary) Its Crossing Opened Nastiness. Tony McCoy O'Grady
SEWERSomewhere Everyone's Waste Eventually Reaches Sean Lamb
Assorted Nouns
SWALLOW FALLSSurging Water Allows Lively Lookout Overflowingly Wet Fascinating Attraction Lovely Landscaped Scenery Jan Morgan -- in Wales
SWAMPSeriously Wet And Mucky Place. Roger Williams
TIDEThen It Does Ebb. Roger Williams
WASAGA BEACHWhat A Sad And Gross Atrocity; Billboards Everywhere; A Complete Hole Rob Rix
WATER (2)Where Are The English Rivers? Rico Leffanta
WATERFALLWhere A Torrent Eternally Rolls Forward - A Liquid Location Tony McCoy O'Grady, who wants to see a submission from AngelFalls Brett
WELLWater! Eureka! Lotsa' Liquid! Roger Williams
Food & Drink