Words That Start With OP

157 words Words by letter Checked 9 Oct 2026

Here are 157 words that start with op, from everyday words to rare ones that are still valid in word games. Common words come first with a short meaning, then the words are grouped by length, which helps with Wordle and crossword clues.

Words starting with op: 157
Most used: open
Shortest: opt
5 letter words: 7

Common words that start with op

#	Word	Meaning	Letters
1	open	cause to open or to become open	4
2	opportunity	a possibility due to a favorable combination of circumstances	11
3	opening	an open or empty space in or between things	7
4	opinion	a personal belief or judgment that is not founded on proof or certainty	7
5	operation	the state of being in effect or being operative	9
6	operations	financial transactions at a brokerage; having to do with the execution of trades and keeping customer records	10
7	opened	used of mouth or eyes	6
8	option	the right to buy or sell property at an agreed price	6
9	operating	involved in a kind of operation	9
10	options	the right to buy or sell property at an agreed price	7
11	opposite	being directly across from each other; facing; - Longfellow	8
12	opportunities	a possibility due to a favorable combination of circumstances	13
13	opposition	the action of opposing something that you disapprove or disagree with	10
14	opposed	being in opposition or having an opponent	7
15	operate	direct or control; projects, businesses, etc.	7
16	opens	cause to open or to become open	5
17	opinions	a personal belief or judgment that is not founded on proof or certainty	8
18	operated	direct or control; projects, businesses, etc.	8
19	operator	(mathematics) a symbol or function representing a mathematical operation	8
20	opera	a drama set to music	5
21	opponents	a contestant that you are matched against	9
22	operational	pertaining to a process or series of actions for achieving a result	11
23	opponent	a contestant that you are matched against	8
24	operators	(mathematics) a symbol or function representing a mathematical operation	9
25	operates	direct or control; projects, businesses, etc.	8
26	openly	in an open way	6
27	optical	of or relating to or involving light or optics	7
28	opposing	characterized by active hostility	8
29	oppose	be against; express opposition to	6
30	optimal	most desirable possible under a restriction expressed or implied	7
31	optional	possible but not necessary; left to personal choice	8
32	opt	select as an alternative over another	3
33	opener	the first event in a series	6
34	optimistic	expecting the best in this best of all possible worlds	10
35	operative	being in force or having or exerting force	9
36	oppression	the act of subjugating by cruelty	10
37	opted	select as an alternative over another	5
38	openings	an open or empty space in or between things	8
39	optimism	the optimistic feeling that all is going to turn out well	8
40	optimization	the act of rendering optimal	12
41	optic	of or relating to or resembling the eye	5
42	optics	the branch of physics that studies the physical properties of light	6
43	oppressed	come down on or keep down by unjust use of one's authority	9
44	optimum	most desirable possible under a restriction expressed or implied	7
45	operatives	a person secretly employed in espionage for a government	10
46	oppressive	weighing heavily on the senses or spirit	10
47	openness	without obstructions to passage or view	8
48	optimized	make optimal; get the most out of; use best	9
49	opaque	not transmitting or reflecting light or radiant energy; impenetrable to sight	6
50	opposes	be against; express opposition to	7

3 letter words that start with op

4 letter words that start with op

open
opal
opus
opts
oped
opes

5 letter words that start with op

opens
opera
opted
optic
opals
opine
opsin

6 letter words that start with op

opened
option
openly
oppose
opener
optics
opaque
opioid
opting
operas
opiate
opined
opines
optima
operon

7 letter words that start with op

opening
opinion
options
opposed
operate
optical
optimal
optimum
opposes
opioids
openers
opulent
oppress
opacity
opiates
opossum
operand
operant
opining
opuntia
opaline
opposer

8 letter words that start with op

opposite
opinions
operated
operator
opponent
operates
opposing
optional
openings
optimism
openness
optimize
optimist
operatic
opulence
operable
optimise
optioned
optician
operetta
opossums
opencast
operands
openwork
optative
opposers
ophidian
openable

9 letter words that start with op

operation
operating
opponents
operators
operative
oppressed
optimized
opposites
optimally
opportune
oppressor
optically
optimised
optometry
optimists
opticians
optimizer
oppresses
optimizes
operculum
opposable
operettas
opacities

10 letter words that start with op

operations
opposition
optimistic
oppression
operatives
oppressive
optimizing
oppressors
optionally
ophthalmic
oppressing
optimising
optimality
opprobrium
oppositely
optometric
opalescent
optimizers
opaqueness

11 letter words that start with op

opportunity
operational
opinionated
opportunist
opportunism
optometrist
oppositions
operatively
oppressions
operability
optionality
opalescence

12 letter words that start with op

optimization
optimisation
oppositional
opportunists
optometrists
oppressively

Filter all 157 words that start with op

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All words that start with O
5 letter words that start with O
Other starts: oa, ob, oc, od, oi, ol, om, on, oo, or, os, ot

Questions people ask

How many words start with op?

This list has 157 words starting with op, all from a standard word-game dictionary and all seen in real English text.

What are common words that start with op?

open, opportunity, opening, opinion, operation, operations, opened, option.

What 5 letter words start with op?

opens, opera, opted, optic, opals, opine, opsin.

Source: the ENABLE word list (a public-domain dictionary used for word games), ranked by how often each word appears in English text (the open wordfreq project), with short meanings from Princeton WordNet. Offensive words are left out.