American Heritage Dictionary
(2)
Century Dictionary
GNU Webster's 1913
WordNet
(3)
Elsewhere on the web
Ultimately, whatever gets used more will probably win out but my personal thought is that Twittering is the verb that refers to the act of creating a tweet which is the noun.— Inc.com
One example of this new ad opportunity would be a local newspaper that tweets a headline with a link to the full article; at the end of the tweet is an ad from the Adjix network, giving the newspaper a new way to earn revenue.

American Heritage Dictionary (1)
Bubble size: how much this word was used in a year
Bubble height: used more or less than expected, vs. all uses evenly distributed
You can expect to see this word about once a week.
Recently looked upradioisotope · crunch · Hillary · flaccid · hanger-on |
Recent Favoritespygopagus · sanglant · Astacus · sweetbread · qualms |
Recent Pronunciationseu oi oìa u ou e u oìa · the octopi are dry · Kansas City · spell it rite · put it in your pocket |