ABER, mouth of a river
AFON, a river
ALLT, a wooded hillside
BACH (FACH), little, small
BANC, platform or tableland
BECHAN (FECHAN) (B/FYCHAN), small or lesser
BEDD, a grave
BETWS, birch grove, chapel, oratory
BLAEN, extremity or beginning, front
BLAENAU, point, end, tip, top
BOD, being
BRAS, fat, coarse, rich, luxuriant
BRON (FRON), the slope of a hill, almost, nearly
BRYN, a mound or hill
BRYS, haste, hurry
BWLCH (FWLCH), a pass or gap, notch
CAE, an enclosed field, hedge
CAER (GAER), a camp or fortress
CALED, hard, severe, harsh, dry
CANOL (GANOL), the middle one, midst
CAPEL (GAPEL), a chapel
CARN (GARN), a prominence
CARREG, stone
CARTREF, home, abode
CASTELL, a castle or fortress
CEFN, a ridge, back, support
CELLI (GELLI/Y), a grove or copse
CELYN, holly
CEULAN, bank, brink
CIL, a recess or retreat
CLOGWYN, cliff, crag, precipice
COCH (GOCH), red
COED (GOED), a wood, trees
CORNEL, corner
CORS (GORS), a bog or marshy place
CRAIG (GRAIG), a crag, rock
CROES (GROES), a cross
CRUG (GRUG), a heap or mound
CWM, valley
CYMMER (CYMER), a junction or confluence
CWR, edge, border, skirt
DIN (DINAS), a town or hill fort
DOL, meadow
DU (DOU), black
DWFR (DWR), water
DYFFRYN, vale or valley
EGLWYS, a church
ERW, acre
ESGAIR, a long ridge
FFORDD, way or road
FFOS, dirch, trench
FFRID, a plantation, sheep walk
FFYNNON, a well or spring
GALLT, hill, cliff, wood
GAN, with, by; of, from
GARTH, hill or headland
GLAN (LAN), a bank or shore
GLAS (LAS), blue (water) or green (fields)
GLYN, a glen, valley
GOF, smith
GOITRE, a home in the wood
GWAITH, work
GWAUN (WAUN), a common or moor
GWERN (WERN), a swamp or bog
GWYN/GWEN (WYN/WEN), white
HAFOD (HAFOTY), a summer dwelling (on the hill), farm
HENDRE (HENDREF), the main dwelling (valley)
HEN, old
HIR, long
HYFRYD, pleasant, agreeable
ISAF, lowest
LLAN, enclosure (churchyard, church)
LLECH, a flat stone
LLECHWEDD, slope, hillside
LLETY, lodging
LLWYD, grey, sometimes venerable
LLWYN, a grove, bush
LLYDAN, broad, wide
LLYN, a lake, pond
LLYS, a court or hall, palace
LON, lane
MAEN (FAEN), a stone
MAES (FAES), an open field
MAN (FAN/FA), a place
MAWR (FAWR), great or large
MELIN (FELIN), a mill
MERTHYR, a martyr
MIN, edge, brink, lip
MOEL (FOEL), a bare hill
MWYN, a mine or ore
MYNACH, a monk
MYNYDD (FYNYDD), a mountain
NANT, a brook
NEUADD, a hall
NEWYDD, new, fresh
OCHR, side
OGOF, a cave
ONN, ash tree
PANDY, a fulling mill
PANT, a hollow place or valley
PEN, head or top
PENTREF, village
PIGYN, thorn, prickle
PISTYLL, spout, cataract
PLAS, hall, mansion
POETH, hot, burning
PONT (BONT), bridge
PORTH (BORTH), a porch or gate, port
PWLL, a pool, pit or hollow
RHIW, a slope or ascent
RHOS, an open moor, heath
RHYD, a ford
SARN, a causeway
SYCH, dry
TAI, houses
TAL, a headland, brow or hill; tall, lofty
TAN, under
TIR (DIR), land or soil
TIRION, kind, gentle, gracious
TREF/TRE (DREF/DRE), a town or home
TRWYN, nose, snout; point, caps
TWLL, hole
TY (DY), a house
TYDDYN, farm holding
TYN, tight
UCHAF, higher or highest
UWCH, above
Y (YR), the, of the
YN (YM), in, at, into
YNYS, island
YSTRAD, low flat land by a river
YSTWYTH, winding or flexible