| Ath, Agh | (ath) | a ford, shallow part or a river |
| Agha | achadh | a field, level meadow |
| Alt | alt | an eminence, high place, side of a glen |
| Anna, Annagh | eanach | a moor, marsh, soft terrain |
| Ard | ard | a height, top, summit, lofty, higher ground |
| Bally | baile | town, village, homestead |
| Ballagh | bealach | a roadway, passage, gap, pass |
| Barn, Barna | bearna | pass or gap in hill or mountain |
| Barr | barr | top, head, summit |
| Bawn, Baun | ban | small field, enclosure, white coloured |
| Beagh | beithe | abounding with birch trees |
| Bell | beal | mouth, entrance, estuary |
| Ben | beann | peak, pointed hill |
| Boher | bothar | road, way, passage, lane |
| Boley | buaile | place for milking cows, booley or dairy place |
| Brack | breac | speckled, spotted, spotted (with stones, furze) hill |
| Bun | bun | end, bottom, of hills or mountains |
| Caher, Cahir | cathair | stone fort, abode, city |
| Cam | cam | crooked |
| Cappa, Cappagh | ceapach | plot of ground laid out for tillage |
| Carn | carn | heap of stones, rocky summit |
| Carrick, Carrig | carraig | a rock, crag or stone |
| Carrow, Carhoo | ceathramhadh | quarter, measure of land |
| Cashel | caiseal | wall, bulwark, castle |
| Cavan | cabhan | a hollow plain |
| Clar | clar | plain, flat piece of land |
| Cash | clais | furrow, deep ditch |
| Clogh | cloch | stone, rock, cliff |
| Clon, Cloon | cluain | plain, lawn, meadow |
| Cool | cul | back, corner, angle |
| Cor, Corr | cor | a round hill |
| Cosh, Cush | cos | leg, foot, at the foot of, beside |
| Creeve | craobh | branch, bough, tree bush |
| Croagh, Crogh | cruach | rick, stack, piled-up hill |
| Cross | cros | a cross |
| Cuil, Cuill | coill | a wood |
| Curra, Curragh | currach | bog, marsh, soft plain |
| Derry | doire | an oak, oak wood |
| Doo | dubh | black |
| Doon, Dun | dun | a fortress |
| Dreen, Drin | draighean | blackthorn |
| Drom, Drum | druim | the ridge of a hill |
| Eden | eadan | the forehead, brow of a hill |
| Esker | eiscir | ridge of sand hills, ridge of mountains |
| Farn | fearn | alder tree, place abounding in alders |
| Farran | fearann | land, ground, country |
| Freagh | fraoch | heather, heath, a heathy place |
| Gal, Gall | gall | stranger, foreigner |
| Garran, Garraun, Garrane | garran | grove, wood, copse |
| Garry | garrdha | garden |
| Glas | glas | green; of mountain, stream or meadow |
| Glan, Glen | gleann | valley, glen |
| Gol, Goul, Gowl | gabhal | fork, the fork of a hill |
| Gort, Gurt | gort | a field or garden |
| Graigue | graig | village, manor |
| Greenan | griannan | sunny place, bower, summer house |
| Illan, Illaun | oilean | island |
| Inis, Inish, Inch | inis | an island, a field near a river or lake |
| Kell | caol | narrow, slender, straight |
| Kil, Kill | cill | a church or small monastery |
| Knock | cnoc | hill, hillock |
| Lack, Leck, Lick | leac | stone, flagstone, slate |
| Laght | leacht | a grave, pile of stones in memory of the dead |
| Lis, Liss | lios | earthen fort, fortified place, ancient palace |
| Lough | loch | a lake |
| Lag, Leg, Lug, Lugg | lag | a hollow, glen |
| Lear, Lyre | ladhar | a fork, forking of glens or rivers |
| Maghera | machaire | a plain, level ground |
| Maul, Meel | meall | a hillock, eminence |
| Meen | min | a smooth spot on a hill presenting a green surface |
| Mon | moin | turf, peat, bog |
| Money | muine | brake, shrubbery, a hillock |
| Moy | magh | a plain, plain of hills |
| Muck | muc | a pig or boar |
| Mullagh | mullach | top, summit height, top of a hill |
| Park | pairc | field, meadow |
| Poll, Pol, Poul | poll | hole, pit, a measure of land |
| Port | port | a harbour, bank or landing place |
| Rath | rath | earthen fort with trees, a fortress |
| Ring, Rin, Rinn | rinn | a headland, promontory |
| Roe, Roo | ruadh | red, gorse clad hill |
| Ros, Ross | ros | a promontory, isthmus, a grove or wood |
| Scart | scairt | a thick tuft of shrubs or bushes |
| Shan | sean | old, e.g. Shanbally, "old town" |
| Sra, Sragh, Srah | srath | a field on the bank of a river |
| Tawnagh, Tawny | tambnach | a small field |
| Temple | teampall | a church or temple |
| Ti | tigh | a house |
| Tir | tir | land, country, region |
| Tober | tobar | well, fountain, spring, source |
| Tom | tuaim | a grave or tumulus |
| Ton | toin | backside |
| Toor | tuar | a place for bleaching clothes |