Words that start
with the letter O

-ock
definition: A suffix used to form diminutives; as
Bullock hillock.
-ock is a 4 letter word that begins with a - and ends in a K

-oid
definition: A suffix or combining form meaning like
Resembling in the form of; as in anthropoid asteroid spheroid.
-oid is a 4 letter word that begins with a - and ends in a D

-ol
definition: A suffix denoting that the substance in the name of which it appears belongs to the series of alcohols or hydroxyl derivatives
As carbinol glycerol etc.
-ol is a 3 letter word that begins with a - and ends in an L

-oma
definition: A suffix used in medical terms to denote a morbid condition of some part
Usually some kind of tumor; as in fibroma glaucoma.
-oma is a 4 letter word that begins with a - and ends in an A

-one
definition: A suffix indicating that the substance
In the name of which it appears is a ketone; as acetone.
-one is a 4 letter word that begins with a - and ends in an E

-one
definition: A termination indicating that the hydrocarbon to the name of which it is affixed belongs to the fourth series of hydrocarbons
Or the third series of unsaturated hydrocarbonsl as nonone.
-one is a 4 letter word that begins with a - and ends in an E

-or
definition: A noun suffix denoting an act; a state or quality; as in error
Fervor pallor candor etc.
-or is a 3 letter word that begins with a - and ends in an R

-or
definition: A noun suffix denoting an agent or doer; as in auditor
One who hears; donor one who gives; obligor elevator. It is correlative to -ee. In general -or is appended to words of Latin and -er to those of English origin. See -er.
-or is a 3 letter word that begins with a - and ends in an R

-ory
definition: A noun suffix denoting that which pertains to
Or serves for; as in ambulatory that which serves for walking; consistory factory etc.
-ory is a 4 letter word that begins with a - and ends in a Y

-ory
definition: An adjective suffix meaning of or pertaining to
Serving for; as in auditory pertaining to or serving for hearing; prohibitory amendatory etc.
-ory is a 4 letter word that begins with a - and ends in a Y

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