According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 524 words with the pattern S-R-------. That is, ten letter words with 1st letter S and 3rd letter R. In alphabetical order, they are:

sarabandes

sarbacanes

sarcocarps

sarcocolla

sarcolemma

sarcomeres

sarcophagi

sarcoplasm

sarcosomal

sarcosomes

sardonical

sardonyxes

sargassums

sarmentose

sarmentous

sarpanches

sarracenia

scrabblers

scrabblier

scrabbling

scraggiest

scragglier

scraggling

scraiching

scraighing

scramblers

scrambling

scranching

scranniest

scrapbooks

scrapegood

scrapeguts

scrapheaps

scrappages

scrappiest

scrapyards

scratchers

scratchier

scratchies

scratchily

scratching

scrattling

scrauching

scraughing

scrawliest

scrawlings

scrawniest

screakiest

screechers

screechier

screeching

screedings

screenable

screenager

screenfuls

screenings

screenland

screenlike

screenplay

screenshot

screevings

screiching

screighing

screwballs

screwbeans

screwiness

screwworms

scribblers

scribblier

scribbling

scrieching

scrigglier

scriggling

scrimmaged

scrimmager

scrimmages

scrimpiest

scrimpness

scrimshank

scrimshaws

scrippages

scriptoria

scriptural

scriptures

scritching

scriveners

scrivening

scrobicule

scrofulous

scroggiest

scrollable

scrollwise

scrollwork

scrooching

scrootched

scrootches

scroungers

scroungier

scrounging

scrowdging

scrubbable

scrubbiest

scrubbings

scrublands

scrubwoman

scrubwomen

scruffiest

scrumdowns

scrummaged

scrummager

scrummages

scrummiest

scrumpling

scrumpoxes

scruncheon

scrunchier

scrunchies

scrunching

scrunchion

scruntiest

scrupulous

scrutators

scrutineer

scrutinies

scrutinise

scrutinize

scrutinous

scrutoires

sdrucciola

seraphical

seraphines

seraskiers

serenaders

serenading

sereneness

serenities

serialised

serialises

serialisms

serialists

serialized

serializes

seriations

sericteria

serigraphs

serigraphy

serinettes

seriocomic

serjeantry

sermoneers

sermonette

sermonical

sermonings

sermonised

sermoniser

sermonises

sermonized

sermonizer

sermonizes

serologies

serologist

serosities

serotinies

serotinous

serotonins

serotyping

serousness

serpentine

serpentise

serpentize

serpigines

serpulites

serradella

serradilla

serranoids

serrasalmo

serrations

serratures

serratuses

serrefiles

serrulated

servanting

serviceman

servicemen

serviettes

servilisms

servitress

servitudes

servomotor

shreddiest

shreddings

shrewdness

shrewishly

shrewmouse

shrieching

shriekiest

shriekings

shrievalty

shrilliest

shrillings

shrillness

shrimpiest

shrimpings

shrimplike

shrinelike

shrinkable

shrinkages

shrinkpack

shritching

shriveling

shrivelled

shroffages

shroudiest

shroudings

shroudless

shrubbiest

shrublands

sirenising

sirenizing

sironising

sironizing

skreeghing

skreighing

skrieching

skrieghing

skrimmaged

skrimmages

skrimshank

sorbitised

sorbitises

sorbitized

sorbitizes

sordamente

sordidness

soreheaded

sorenesses

soricident

sororially

sororicide

sororising

sororities

sororizing

sorrowings

sorrowless

sortations

sortileger

sortileges

sortitions

sprackling

spraddling

sprangling

sprattling

sprauchled

sprauchles

sprauncier

sprawliest

spreadable

spreadings

spreaghery

spreathing

spreething

sprekelias

spriggiest

sprightful

sprighting

sprigtails

springalds

springboks

springbuck

springeing

springhaas

springhalt

springhase

springhead

springiest

springings

springless

springlets

springlike

springtail

springtide

springtime

springwood

springwort

sprinklers

sprinkling

sprintings

spritelier

spritsails

sproutings

spruceness

sprynesses

strabismal

strabismic

strabismus

strabotomy

stracchini

stracchino

straddlers

straddling

stragglers

stragglier

straggling

straichter

straighted

straighten

straighter

straightly

strainedly

strainings

straitened

straitness

stramacons

stramashed

stramashes

stramazons

stramonies

stramonium

strandflat

strandline

strandwolf

strangered

stranglers

strangling

straphangs

straplines

strapontin

strappados

strappiest

strappings

strapworts

stratagems

strategics

strategies

strategise

strategist

strategize

strathspey

stratified

stratifies

stratiform

stratocrat

strauchted

strauchter

straughted

straughter

stravaging

stravaiged

stravaiger

strawberry

strawboard

strawworms

straylings

streakiest

streakings

streaklike

streambeds

streamered

streamiest

streamings

streamless

streamlets

streamlike

streamline

streamling

streamside

streetages

streetboys

streetcars

streetfuls

streetiest

streetlamp

streetroom

streetward

streetwear

streetwise

streigning

strelitzes

strelitzia

strengthen

streperous

strepitant

strepitoso

strepitous

stressless

stretchers

stretchier

stretching

strewments

striations

striatures

strickenly

strickling

strictions

strictness

strictured

strictures

striddling

stridelegs

stridences

stridently

strideways

stridulant

stridulate

stridulous

strifeless

strigiform

strikeless

strikeouts

strikeover

strikingly

stringency

stringendo

stringhalt

stringiest

stringings

stringless

stringlike

strinkling

stripagram

stripeless

stripiness

striplings

strippable

strippings

striptease

strivingly

strobilate

strobiline

strobiloid

strobotron

stroddling

stroganoff

strokeplay

strollings

stromatous

strombuses

strongarms

stronghold

strongness

strongroom

strongyles

strontians

strontiums

strophical

strophiole

strophoids

strophulus

stroppiest

stroudings

stroupachs

structural

structured

structures

strugglers

struggling

strumpeted

struthioid

struthious

struttings

strychnias

strychnine

strychnism

surbedding

surceasing

surcharged

surcharger

surcharges

surcingled

surcingles

surculuses

surefooted

surenesses

suretyship

surfaceman

surfacemen

surfacings

surfactant

surfboards

surfcaster

surfeiters

surfeiting

surffishes

surfriders

surgically

surjection

surjective

surmasters

surmisable

surmisings

surmounted

surmounter

surmullets

surnominal

surpassers

surpassing

surplusage

surplusing

surplussed

surplusses

surprinted

surprisals

surprisers

surprising

surprizing

surquedies

surrealism

surrealist

surrejoins

surrenders

surrogated

surrogates

surrogatum

surrounded

surveiling

surveilled

surveilles

surveyable

surveyance

surveyings

surviewing

survivable

survivance

syringitis