The /d/ sound is spelled with <d>, <dd> or <de>, and the /n/ sound is <n> or <nn>. Notice how the homograph do makes pairs with with know and now.
The contrast is between a voiced stop and a nasal continuant. Though they are close together in the mouth, it is not a problem for learners.
The only taboo word pair is digger/nigger.
Interesting pairs include:
The mean density value is 2.3%. The list makes 359 semantic distinctions, a loading of 66%.
adder anna adders annas addles annals adieu anew adored adorn allied align altered Alton ad Ann add Ann arcade arcane arrayed arraign aside assign asides assigns augured organ baa'd barn bad ban bade ban bared bairn bayed bane bard barn bards barns barred barn battered baton bawd Bourne bawd born bawd borne bead bean beads beans bead been bed ben beds bens begad began bestrewed bestrewn bird Bern bird burn birds burns bid bin bids bins bide bine bides bines blackbird Blackburn blowed blown board Bourne board born board borne bode bone bodes bones boding boning body bonny booed boon brad bran braid brain braiding braining braids brains broad brawn bread Bren bride brine brides brines brokered broken bud bun buds buns buddy bunny buddies bunnies cad can cads cans cad Cannes caddie canny capered capon carbide carbine carbides carbines card Calne card khan cards khans cared cairn careered Korean cawed corn cede scene cedes scenes cede seen chid chin chide chine chides chines chord corn chords corns ciphered siphon clad clan cloud clown clouding clowning clouds clowns cod con codding conning cods cons code cone codes cones coding coning confide confine confides confines confiding confining cooed coon cord corn cords corns cording corning crewed croon crowed crone crowd crown crowding crowning crowds crowns crude croon cruder crooner curled Koln D knee D's knees dab nab dabbed nabbed dabbing nabbing dabs nabs daddy nanny daddies nannies dagger nagger daggers naggers Dakar knacker dale nail dales nails dame name dames names Dan dad Dan Nan Danny daddy dare ne'er dark nark dash gnash dashed gnashed dashes gnashes dashing gnashing dative native datives natives Dave knave Dave nave Davey navy daw gnaw daws gnaws day nay day n�e day neigh days neighs dead den dead Ned deal Neil deal kneel dealing kneeling deals kneels dealt knelt deed dean deeds deans dear near dearer nearer dearest nearest dearly nearly dearness nearness dears nears debt net debts nets deck neck decked necked decking necking decks necks defied define Delhi Nelly dell Nell derv nerve devil Neville dew knew dew new dhow now Di nigh dibble nibble dibbled nibbled dibbles nibbles dibbling nibbling dice nice Dick Nick dickers knickers did din die nigh died dine digger nigger diggers niggers dill nil dine nine dines nines dip nip dipped nipped dipping nipping dips nips dipper nipper dippers nippers dire nigher ditches niches dives knives divide divine dividers diviners divides divines dividing divining do gnu do's gnus do know dos knows do no dos nose doe know does knows doe no does nose dock knock docked knocked docking knocking docks knocks docker knocker dockers knockers dole knoll doles knolls dome gnome domes gnomes dominate nominate dominated nominated dominates nominates dominating nominating domination nomination doodle noodle doodles noodles door gnaw doors gnaws door nor doorway Norway dope nope Dora Nora dot knot dots knots dotted knotted dotting knotting dot not dote note doted noted dotes notes doting noting dotty knotty dottier knottier dottiest knottiest doubt knout doubts knouts dough know dough no douse nous dowdy downy down noun downs nouns doze knows doze nose dozed nosed dozes noses dozing nosing dual newel dub nub dubs nubs duckling knuckling dud done dud dun duds duns dude dune dudes dunes dude nude dudes nudes due knew due new dues news duel newel duels newels dull null duly newly dumb numb dumbly numbly dumbness numbness durst nursed erred earn erred urn Ed N Eddie any enjoin enjoyed fad fan fads fans faddy Fanny fade fain fade feign fades feigns fading feigning ford faun fords fauns ford fawn fords fawns fording fawning Fed fen florid florin flowed flown foreigner forrader fuddle funnel fuddled funnelled fuddles funnels giddy Guinea God gone grade grain grades grains greed green grid grin grids grins hawed horn head hen heads hens heard Herne hewed hewn hoard horn hoarding horning hoards horns hoed hone horde horn hordes horns humoured human id 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Credit: John Higgins