Yes it is only found in animal cells

According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 11 words with the pattern --NE-O---. That is, nine letter words with 3rd letter N and 4th letter E and 6th letter O. In alphabetical order, they are:

conenoses

daneworts

hanepoots

honeworts

lonesomes

nineholes

nonerotic

nonexotic

panegoism

pinecones

pinewoods

According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 10 words with the pattern -O--SO---. That is, nine letter words with 2nd letter O and 5th letter S and 6th letter O. In alphabetical order, they are:

folksongs

foursomes

gonosomes

ionosonde

lonesomes

monosomes

monosomic

polysomes

polysomic

voussoirs

According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 1 words with the pattern ---ESOM-S. That is, nine letter words with 4th letter E and 5th letter S and 6th letter O and 7th letter M and 9th letter S. In alphabetical order, they are:

lonesomes

According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 23 words with the pattern LO-E-----. That is, nine letter words with 1st letter L and 2nd letter O and 4th letter E. In alphabetical order, they are:

lobectomy

lobelines

locellate

lodestars

lodestone

lomentums

loneliest

lonesomes

lovebirds

lovebites

lovefests

loveliest

lovelight

lovelocks

lovemaker

loverless

loveseats

lovevines

lowerable

lowercase

loweriest

lowerings

lowermost