semicentenarian
Synonym of fiftysomething: A person celebrating a semicentenary; a person between 50 and 59 years old.

semicentenarians
plural of semicentenarian

septemvigintillion
Alternative form of septenvigintillion.

septendecillion
10⁵⁴.
10¹⁰².

septendecillions
plural of septendecillion

septentrigintillion
10¹¹⁴.

septenvigintillion
10⁸⁴.

septillion
A trillion trillion: 1 followed by 24 zeros, 10²⁴.
A billion quintillion: 1 followed by 42 zeros, 10⁴².

septillions
plural of septillion

septuagintillion
10²¹³.

septuagintillions
plural of septuagintillion

sesvigintillion
Alternative form of sexvigintillion.

sethera
six in Cumbrian sheep counting

seuen
Obsolete typography of seven.

sevendy
Pronunciation spelling of seventy.

seventeen
The cardinal number occurring after sixteen and before eighteen, represented in Roman numerals as XVII and in Arabic numerals as 17.

seventeens
plural of seventeen

seventy
The cardinal number occurring after sixty-nine and before seventy-one, represented in Roman numerals as LXX and in Arabic numerals as 70.

seventyeight
Alternative form of seventy-eight.

seventyfive
Alternative form of seventy-five.

seventyfour
Alternative form of seventy-four.

seventynine
Alternative form of seventy-nine.

seventyodd
Slightly more than seventy.

seventyone
Alternative form of seventy-one.

seventyseven
Alternative form of seventy-seven.

seventysix
Alternative form of seventy-six.

seventysomething
An indeterminate value between 70 (inclusive) and 80 (exclusive).

seventythree
Alternative form of seventy-three.

seventytwo
Alternative form of seventy-two.

sexagintillion
10¹⁸³.

sexdecillion
10⁵¹.
10⁹⁶.

sexdecillions
plural of sexdecillion

sexillion
sextillion

sextillion
A trillion billion: 1 followed by 21 zeros, 10²¹.
A million quintillion: 1 followed by 36 zeros, 10³⁶.

sextillions
plural of sextillion

sextrigintillion
10¹¹¹.

sexvigintillion
10⁸¹.

six
A numerical value equal to 6; the number following five and preceding seven. This number of dots: (••••••).

sixe
Obsolete spelling of six.

sixscore
One hundred and twenty.

sixteen
The cardinal number occurring after fifteen and before seventeen, represented in Arabic numerals as 16 and in Roman numerals as XVI.

sixteens
plural of sixteen

sixty
The cardinal number occurring after fifty-nine and before sixty-one, represented in Roman numerals as LX and in Arabic numerals as 60.

sixtyeight
Alternative form of sixty-eight.

sixtyfive
Alternative form of sixty-five.

sixtyfour
Alternative form of sixty-four.

sixtynine
Alternative form of sixty-nine.

sixtyodd
Slightly more than sixty.

sixtyone
Alternative form of sixty-one.

sixtyseven
Nonstandard form of sixty-seven.

sixtysix
Alternative form of sixty-six.

sixtysomething
An indeterminate value between 60 (inclusive) and 70 (exclusive).

sixtythree
Alternative form of sixty-three.

sixtytwo
Alternative form of sixty-two.

synaereses
plural of synaeresis

synaeresis
The contraction of two vowels into a diphthong or a long vowel.
The separating out of the liquid from a gel.

synairesis
Alternative form of synaeresis.

synecphoneses
plural of synecphonesis

synecphonesis
A contraction of two syllables into one.

synereses
plural of syneresis

syneresis
Alternative spelling of synaeresis.

syxe
Obsolete spelling of six.

ten
The number occurring after nine and before eleven, represented in Arabic numerals (base ten) as 10 and in Roman numerals as X.

tenne
Obsolete spelling of ten.

tenodd
Slightly more than ten.

tens
plural of ten

tenteen
Twenty.

tethera
three in Celtic sheep counting

thirdy
Pronunciation spelling of thirty.

thirteen
The cardinal number occurring after twelve and before fourteen: ten and three.

thirteens
plural of thirteen

thirtie
Obsolete spelling of thirty.

thirty
The cardinal number occurring after twenty-nine and before thirty-one, represented in Arabic numerals as 30.

thirtyeight
Alternative form of thirty-eight.

thirtyfive
Alternative form of thirty-five.

thirtyfour
Alternative form of thirty-four.

thirtynine
Alternative form of thirty-nine.

thirtyodd
Slightly more than thirty.

thirtyone
Alternative form of thirty-one.

thirtyseven
Alternative form of thirty-seven.

thirtysix
Alternative form of thirty-six.

thirtythree
Alternative form of thirty-three.

thirtytwo
Alternative form of thirty-two.

thousand
A numerical value equal to 1,000 = 10 × 100 = 10³ (1 E+3 exactly—in scientific E notation.)

thousands
plural of thousand

thowsand
Obsolete form of thousand.

thowsands
plural of thowsand

thre
Obsolete spelling of three.

three
A numerical value after two and before four. Represented in Arabic digits as 3; this many dots (•••).
Describing a set or group with three elements.

threeteen
thirteen

threety
Thirty.

thretteen
thirteen

thretties
plural of thretty

thretty
thirty

threy
Obsolete spelling of three.

throtteen
Thirteen.

tredecillion
10⁴².
10⁷⁸.

tredecillions
plural of tredecillion

trequadragintillion
10¹³².

tresvigintillion
Alternative form of trevigintillion.

trevigintillion
10⁷².
10¹³⁸.

trigintillion
10⁹³.
10¹⁸⁰.

tril
Abbreviation of trillion.

trilliard
One thousand long scale trillions, or one short scale sextillion; equal to 10²¹ (1 followed by twenty-one 0s).

trilliards
plural of trilliard

trillion
Either of two large amounts:
Either of two large amounts:
An unspecified very large number.

trillions
plural of trillion

turbillion
A whirlwind or vortex.

turbillions
plural of turbillion

tway
Two.

twelfty
One hundred and twenty; 120.

twelue
Obsolete spelling of twelve.

twelve
The cardinal number occurring after eleven and before thirteen, represented in Arabic numerals as 12 and in Roman numerals as XII.

twelvehundred
Alternative form of twelve hundred.

twelveteen
Twelve.
Twenty-two.

twelvety
Alternative form of twelfty.

twenny
Pronunciation spelling of twenty.

twentie
Obsolete spelling of twenty.

twenty
The cardinal number 20, occurring after nineteen and before twenty-one.

twentyeight
Alternative form of twenty-eight.

twentyfive
Alternative form of twenty-five.

twentyfour
Alternative form of twenty-four.

twentynine
Alternative form of twenty-nine.

twentyodd
Slightly more than twenty.

twentyone
Alternative form of twenty-one.

twentyseven
Alternative form of twenty-seven.

twentysix
Alternative form of twenty-six.

twentythree
Alternative form of twenty-three.

twentytwo
Alternative form of twenty-two.

twey
Archaic form of two.

two
A numerical value equal to 2; this many dots (••).
Describing a set or group with two elements.

twomp
20 U.S. dollars' worth of marijuana.
Twenty.

twomps
plural of twomp

twoo
Obsolete spelling of two.

twothirds
Rare spelling of two-thirds.

twoty
Twenty.

tyan
Two in Cumbrian sheep counting.

undecillion
10³⁶.
10⁶⁶.

undecillions
plural of undecillion

undevigintillion
Synonym of novemdecillion.

undevigintillions
plural of undevigintillion

unquadragintillion
10¹²⁶.

untrigintillion
10⁹⁶.

unvigintillion
10⁶⁶.
10¹²⁶.

unvigintillions
plural of unvigintillion

vigintillion
Originally, in accordance with the long scale, the twentieth power of a million, 10¹²⁰; now (originally US), in accordance with the short scale, more usually 10⁶³.

vigintillions
plural of vigintillion

vingtillion
Misconstruction of vigintillion.

wun
Eye dialect spelling of one.

yearhundred
Century (a hundred-year timespan).

yearhundreds
plural of yearhundred

yearthousand
millennium (a thousand-year timespan)

yearthousands
plural of yearthousand

yin
A principle in Chinese and related East Asian philosophies associated with dark, cool, female, etc. elements of the natural world.

yoleven
The number eleven.

aftanoon
Pronunciation spelling of afternoon.

aftanoons
plural of aftanoon

afternoon
The part of the day from noon or lunchtime until sunset, evening, or suppertime or 6pm.
The later part of anything, often with implications of decline.
A party or social event held in the afternoon.