O

Hoop-shaped capital letter

The letter O preceding a noun or a name is usually a way of calling more attention to it, often to indicate sadness or loss.

It’s a variant of oh and the representation of a natural utterance that is found in other languages.

zero

nothing

Not any thing

  • nilNothing whatsoever
  • nullAbsence indicator in code
  • noughtBritish term for zero

naught · zilch · zip · cipher · goose egg · empty · void · blank · none · absence

letter

alphabet

Language's letter system

lowercase · typography · glyph · character · phoneme · orthography · script · typeface · font · calligraphy

shape

circle

Curved closed shape

  • roundCurved like circle
  • ovalElongated rounded shape
  • ringClosed curve shape

ellipse · loop · hoop · zero · letter · mouth · donut · bagel · porthole · halo

exclamation

surprise

Unexpected event causing astonishment

eureka · wow · gasp · whoa · gosh · blimey · crikey · yikes · oops · vocative

bloodtype

donor

One who contributes freely

compatibility · Rh factor · antigen · plasma · blood bank · crossmatch · negative · positive · typing · antibody

Categories
Opposites
alphabetic position

OI

First-person subject pronoun

A · Z · K · W · M

numeric value (zero vs. non-zero)

O1

Smallest positive integer

one · something · infinity · all · many

blood type antigen

OAB

ABO group category

A · B

Phrases
Family

oh

Familiarity
Top 500,000
Profile
Known to kids · Used worldwide · Timeless · Concrete · Everyday, not technical · Rated G