Hawaii

aalii

aaliis

alibiing

assagaiing

assegaiing

bacchii

chivariing

congii

coniine

coniines

denarii

euphausiid

euphausiids

filariid

filariids

gastrocnemii

genii

medii

nauplii

obiism

obiisms

piing

radii

reduviid

reduviids

retiarii

safariing

sartorii

saturniid

saturniids

senarii

septenarii

sextarii

shanghaiing

shiitake

shiitakes

skiing

skiings

splenii

taxiing

teiid

teiids

tholeiite

tholeiites

tholeiitic

torii

trapezii

triiodothyronine

triiodothyronines

turfskiing

turfskiings

waterskiing

waterskiings

zombiism

zombiisms

6 letter m words: * marble * magnet * mallet * martin (bird) * mallow * mangle * magpie (bird) * mantle * market * marked * matter * mainly * marvel * maiden * mental * missile * misery * middle * mirror * misuse * mitten * minute * mingle * mostly * mother * mortal * modest * morbid * modern * monkey * muscle * mumble * muffle * muzzle * muster

• blessed
• blouses
• bruised
• chassis
• cruiser
• deposit
• dressed
• greaser
• misused
• pleased
• pressed
• reissue
• thirsty
• treason

There are hundreds, some examples are: ASCII ascot ascus ASEAN ashen ashes Asian aside asked askew askey Aslan ASPCA Aspen asper aspic aspie assai Assam assay asses ASSET assig Assoc aster astir ASTMS Astro CSChE esbat esker Espoo essay Essex ester estop HSCSD HSDPA HSUPA Isaac isbas ISCSI isnad ISRHA issue NSAID NSPCC Oscan Oscar osier osone Ostia Ostic psalm pseud pshaw pssst psych RSFSR RSPCA SSNRI SSRIB tsine tsubo tsuna USADA usage users usher using usque usual usurp usury