Three letter words ending in -s are:YesBusAdsCosHasHisInsSisSosWas
Some four letter words starting with S and ending with F are:selfserfsurf
shoes ,
addressagelessanxiousbignesscolitiscompassconfessdrynessgenesisgeniusimpressjealousmitosisnewnessregressseriousshynesssinlesssuccesssunlesstedioustenuousundressuselesswitless
sacramentsscarecrowssegregatesshrewdnesssimplifiessleevelesssmoothnesssnowflakessociopathsspeechlesssquarenessstimulatessubscribes
stomata
Sunrisesspaciousstudioussensuoussonorousscissorssleeplessstraplessshiftlessshirtlessshinglessightlesssalacious
ActionsActivesActressAnimalsBeachesBeaconsBeaglesBeakersBeaniesBearersBeatersBeavers
said is a 4 letter word beginning with s and ending with d
sayssawsseesspys
crows, carts
* alas * axis