sisterhood vs. sistership
shipbuilder vs. shipwright
squad vs. team
shindig vs. shindy
suburb vs. suburbia
shudra vs. sudra
secretariat vs. secretariate
schmear vs. schmeer
schmeer vs. shmear
sharia vs. shariah
soil vs. territory
smother vs. surround
sheikdom vs. sheikhdom
see vs. understand
see vs. walk
see vs. visit
savanna vs. savannah
semitropics vs. subtropics
sliver vs. splinter
silva vs. sylva
sky vs. toss
slough vs. sphacelus
spall vs. spawl
seaboard vs. seaside
secede vs. splinter
sun vs. sunbathe
solarize vs. sun
solarise vs. sun
swamp vs. swampland
sod vs. turf
sod vs. sodomite
sod vs. sodomist
sward vs. turf
scree vs. talus
succuba vs. succubus
shaitan vs. shaytan
soaker vs. waterspout
slut vs. trollop
slattern vs. slut
sis vs. sister
slogger vs. slugger
slogger vs. trudger
stumbler vs. tripper
scammer vs. swindler
sheik vs. sheikh
steerer vs. steersman
shitter vs. voider
sneak vs. stalker
saboteur vs. wrecker
scalawag vs. scallywag
shammer vs. skulker
scholar vs. student
sib vs. sibling
systematist vs. taxonomer
seer vs. visionary
shrink vs. shrivel
shrink vs. wither
shrink vs. wince
schmo vs. shmo
salesgirl vs. saleswoman
salesgirl vs. saleslady
schnook vs. shnook
schnorrer vs. shnorrer
salvager vs. salvor
schoolfellow vs. schoolmate
sannyasi vs. sannyasin
sannyasi vs. sanyasi
scorekeeper vs. scorer
scrawler vs. scribbler
saxist vs. saxophonist
scrutiniser vs. scrutinizer
sachem vs. sagamore
saddhu vs. sadhu
schlemiel vs. shlemiel
sealant vs. sealer
safebreaker vs. safecracker
schlimazel vs. shlimazel
schlockmeister vs. shlockmeister
schmo vs. schmuck
schmo vs. shmuck
settlor vs. trustor
slave vs. striver
sightseer vs. tripper
slaveholder vs. slaver
signaler vs. signaller
sacristan vs. sexton
signatory vs. signer
signior vs. signor
sleepwalker vs. somnambulist
seizer vs. shanghaier
silversmith vs. silverworker
seedman vs. seedsman
sheepherder vs. shepherd
sheepherder vs. sheepman
segregationist vs. segregator
selectman vs. selectwoman
sheika vs. sheikha
seller vs. vendor
seller vs. vender
semanticist vs. semiotician
shiksa vs. shikse
seminarian vs. seminarist
semipro vs. semiprofessional
skivvy vs. slavey
shirker vs. slacker
shareholder vs. stockholder
shareowner vs. stockholder
stager vs. warhorse
stammerer vs. stutterer
softie vs. softy
spokesperson vs. voice
solon vs. statesman
sophisticate vs. twist
soph vs. sophomore
sorcerer vs. wizard
steelmaker vs. steelworker
steelmaker vs. steelman
scorner vs. sneerer
sniffler vs. sniveler
snoop vs. snooper
smotherer vs. stifler
specialiser vs. specialist
specialiser vs. specializer
socialiser vs. socializer
subsidiser vs. subsidizer
syllogist vs. syllogizer
syllogiser vs. syllogist
subvocaliser vs. subvocalizer
succorer vs. succourer
symbolist vs. symbolizer
symboliser vs. symbolist
suer vs. suitor
suer vs. wooer
sympathiser vs. sympathizer
straggler vs. strayer
stranger vs. unknown
strategian vs. strategist
supermarketeer vs. supermarketer
shadower vs. tail
seamster vs. tailor
sartor vs. tailor
surfboarder vs. surfer
sawbones vs. surgeon
surrenderer vs. yielder
sutler vs. victualer
sutler vs. victualler
swinger vs. tramp
subduer vs. surmounter
switcher vs. whipper
stealer vs. thief
symposiarch vs. toastmaster
sustainer vs. upholder
shylock vs. usurer
supplanter vs. usurper
scoundrel vs. villain
sybarite vs. voluptuary
spewer vs. vomiter
squirmer vs. wiggler
slipstream vs. wash
shedding vs. sloughing
sou'easter vs. southeaster
sunbeam vs. sunray
simoom vs. simoon
samiel vs. simoom
smother vs. suffocate
squall vs. waul
squall vs. wawl
sandarac vs. sandarach
siliqua vs. silique
shittim vs. shittimwood
spoonflower vs. yautia
starwort vs. stitchwort
saguaro vs. sahuaro
sanicle vs. snakeroot
sandbur vs. sandspur
sorgho vs. sorgo
salal vs. shallon
sourwood vs. titi
shagbark vs. shellbark
silverberry vs. silverbush
shellflower vs. turtlehead
shellflower vs. snakehead
scilla vs. squill
sissoo vs. sissu
sisham vs. sissoo
sainfoin vs. sanfoin
snowberry vs. waxberry
salmonberry vs. thimbleberry
spiraea vs. spirea
scabiosa vs. scabious
sumac vs. sumach
shumac vs. sumac
skunkbush vs. squawbush
speedwell vs. veronica
subshrub vs. suffrutex
sporophyl vs. sporophyll
sublease vs. sublet
supertax vs. surtax