The /s/ sound is spelled with <s>, <ss>, <ce>, <ps> in pseud, <sc> in Scylla or <sw> in sword. The /m/ sound is spelled with <m>, <mm> or <lm> in palm. Several pairs arise from adjectival endings applied to Latinate words, such as delirious/delirium and momentous/momentum.
This is a contrast between a voiceless alveolar sibilant fricative and a voiced nasal bilabial continuant. It causes no problems.The only taboo word pair is arse/arm.
Interesting pairs include:
The mean density value is 2.1%. The list makes 267 semantic distinctions, a loading of 59%.
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remould rice rhyme S M sable Mabel sac mac sacs macs sack mac sacks macs sacks Max sad mad sadder madder saddest maddest sadly madly sadden madden saddened maddened saddening maddening saddens maddens sadness madness sag mag sags mags said Med sail mail sailed mailed sailing mailing sails mails sail male sails males saints Mainz sake make sakes makes sale mail sales mails sale male sales males sallow mallow sallows mallows salmon mammon salt malt salted malted salting malting salts malts Sam ma'am samba mamba sambas mambas same maim Sammy mammy sand manned Sandy Mandy sane Maine sane main sanely mainly sane mane sans mans sap map sapped mapped sapping mapping saps maps Sapphic maffick sash mash sashes mashes sat Matt sat mat sate mate sated mated sates mates sating mating satyr matter satyrs matters sauce Morse saw maw saws maws saw more sawed Maud sawn morn sawn mourn say may scene mean scenes means Scylla miller Scyllas millers sea me sear mere sears meres seat meat seats meats seat 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John Higgins, Shaftesbury, November 2010.