According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 8 words with the pattern -TR----I-. That is, nine letter words with 2nd letter T and 3rd letter R and 8th letter I. In alphabetical order, they are:

strategic

stratonic

stromatic

strophoid

strumatic

strumitis

strychnia

strychnic

It is a curve described by the polar equation: r= 1+2sin(φ/2), (note the 2 in front of sine) named after and English mathematician T. J. Freeth (1819-1904) which first appeared in a paper he published in the London Mathematical Society in 1879.

It is considered an extention of Freeths strophoid which is generalized by the equation:

r= a[1+bsin(φ/2)]

See also information at: http://mathworld.wolfram.com/FreethsNephroid.HTML

According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 1 words with the pattern --R-P-O-D. That is, nine letter words with 3rd letter R and 5th letter P and 7th letter O and 9th letter D. In alphabetical order, they are:

strophoid

According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 43 words with the pattern ---OP-O--. That is, nine letter words with 4th letter O and 5th letter P and 7th letter O. In alphabetical order, they are:

acrophobe

acrophony

aerophobe

aerophone

aerophore

allophone

angophora

autophoby

autophony

cacophony

colophons

colophony

cryoprobe

ectoproct

endoproct

entoproct

gonophore

gynophobe

gynophore

halophobe

holophote

homophobe

homophone

homophony

hypoploid

hypopnoea

hypopyons

ideophone

idiophone

iodophors

ionophore

monophony

monoploid

monopsony

monoptote

octoploid

optophone

pyrophone

saxophone

strophoid

xenophobe

xenophoby

xylophone

According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 70 words with the pattern ST----O--. That is, nine letter words with 1st letter S and 2nd letter T and 7th letter O. In alphabetical order, they are:

stackroom

staffroom

stairfoot

stairwork

stallions

staminode

staminody

staminoid

standdown

starspots

starstone

statehood

stateroom

statutory

steamboat

steamroll

steelbows

steelwork

steenboks

stegodons

stegodont

steinbock

steinboks

stellions

stenokous

stepstool

sternmost

sternport

sternpost

sternsons

stevedore

stickwork

stictions

stillborn

stillions

stillroom

stinkhorn

stinkpots

stinkwood

stipiform

stirabout

stockhorn

stocklock

stockpots

stockroom

stocktook

stockwork

stokehold

stokehole

stomatous

stoneboat

stonework

stonewort

storeroom

storybook

stovetops

stradiots

strapwort

strawworm

strenuous

stressors

strikeout

strophoid

studbooks

stumpwork

stuporous

sturgeons

stylebook

styliform

styrofoam