Noun: fas
Nouns inflected like fas
penniless-bench,
wintergrass,
kitchen pass,
grey fox,
grey box,
trailer hitch,
paleness,
loaded march,
Tush Push,
horribleness,
slaughteress,
chapparvovirus,
greenwax,
royal flush,
crab cactus,
geostress,
syngas,
wintercress,
ichthys,
ichthus, etc. (List truncated at 20 nouns)
Etymology
From Middle English fas, from Old English fæs. See: Old English Nouns '
fæs'.