According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 12 words with the pattern ---OSP---. That is, nine letter words with 4th letter O and 5th letter S and 6th letter P. In alphabetical order, they are:

acrospire

aerospace

ascospore

autospore

auxospore

endosperm

endospore

homospory

meiospore

vasospasm

zygosperm

zygospore

According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 4 words with the pattern -O--S-O-Y. That is, nine letter words with 2nd letter O and 5th letter S and 7th letter O and 9th letter Y. In alphabetical order, they are:

colostomy

homospory

horoscopy

poroscopy

According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 8 words with the pattern ---O-POR-. That is, nine letter words with 4th letter O and 6th letter P and 7th letter O and 8th letter R. In alphabetical order, they are:

ascospore

autospore

auxospore

devonport

endospore

homospory

meiospore

zygospore

According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 15 words with the pattern H-M---O--. That is, nine letter words with 1st letter H and 3rd letter M and 7th letter O. In alphabetical order, they are:

hemitrope

hemitropy

himations

homegrown

homerooms

homophobe

homophone

homophony

homospory

humanhood

humongous

humorsome

humungous

hymnbooks

hymnology

According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 17 words with the pattern -O--SP---. That is, nine letter words with 2nd letter O and 5th letter S and 6th letter P. In alphabetical order, they are:

cockspurs

downspins

downspout

forespake

forespeak

forespend

forespent

forespoke

goldspink

gowdspink

homespuns

homospory

loadspace

longspurs

soupspoon

woodspite

workspace