Yes, prions is a Scrabble word!

...and is worth 8 points in Scrabble, and 10 points in Words with Friends

prions

Noun

1. (microbiology) an infectious protein particle similar to a virus but lacking nucleic acid; thought to be the agent responsible for scrapie and other degenerative diseases of the nervous system

What Scrabble words can I make with the letters in prions?

6 Letter Words

orpins
prison
spinor

5 Letter Words

irons
noirs
noris
opsin
ornis
orpin
pions
pirns
porns
prion
rosin

4 Letter Words

inro
ions
iron
nips
noir
nori
pins
pion
pirn
piso
pois
pons
porn
pros
rins
rips
snip
sori
sorn
spin

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3 Anagrams of Prions

orpins
prison
spinor

Words that can be created with an extra letter added to prions:

A:sopraniE:orpinesG:prosingsporingS:prisonsspinorsU:inpoursT:tropins