Several
rules
govern
the
correct
formation
of
plural
nouns.
For
most
nouns,
simply
add
s:
dogs,
houses,
meteors.
Nouns
ending
in
soft
ch,
j,
ss,
x,
or
z
add
es:
churches,
glasses,
axes,
buzzes.
Words
ending
in
o
preceded
by
a
vowel
add
s:
cameos,
tattoos.
Words
ending
in
o
preceded
by
a
consonant
add
es:
heroes,
potatoes.
Pianos
is
an
exception.
When
two
plurals
are
listed
in
Webster’s
Eleventh,
use
the
first.
Apply
the
following
rules
to
unusual
plural
formations:
Unless
there
is
likelihood
of
confusion,
add
only
an
s
to
form
the
plurals
of
numbers,
acronyms,
and
single
or
multiple
letters
used
as
words.
the
1940s
YMCAs
’
40s
ABCs
6s
and
7s
TVs
2x4s
the
three
Rs
dos
don’ts
Use
an
apostrophe
and
an
s
to
form
the
plurals
of
lowercase
letters
used
as
nouns.
x’s
and
y’s
p’s
and
q’s
Use
an
apostrophe
and
an
s
to
form
the
plurals
of
capital
letters
that
would
be
confusing
if
s
alone
were
added.
S’s
and
A’s
Use
an
apostrophe
and
an
s
to
form
the
plurals
of
abbreviations
with
lowercase
letters.
p.m.’s
Use
an
apostrophe
and
an
s
to
form
the
plurals
of
abbreviations
with
internal
periods.
M.A.’s
f.o.b.’s
Use
an
s
to
form
the
plurals
of
abbreviations
with
no
internal
periods.
IQs
Btus
OKs
YMCAs
Also
see
"plurals"
in
the
Abbreviations
section
of
SIMStylebook.com.
Back
to
Stylebook
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