/o/
/oa/
/ow/
/oe/
/o_e/
100

A large tree which bears acorns

Oak


100

A domestic animal kept to be milked and pet.

Goat

100

Moving or operating, or designed to do so, only at a low speed; not quick or fast.

Slow

100

Any of the five digits at the end of the human foot.

Toe

100

A flexible tube conveying water, used chiefly for watering plants and in firefighting.

Hose

200

Used to give a negative response

No

200

A small vessel for travelling over water, propelled by oars, sails, or an engine.

Boat

200

(Of a living thing) undergo natural development by increasing in size and changing physically.

Grow

200

A female deer, especially a female roe, fallow deer, or reindeer.

Doe

200

The place where one lives permanently, especially as a member of a family or household.

Home

300

Allowing access, passage, or a view through an empty space; not closed or blocked.

Open

300

Someone who trains a person or team of people in a particular sport.

OR

A comfortably equipped single-decker bus used for longer journeys.

Coach

300

A large bird with mostly glossy black plumage, a heavy bill, and a raucous voice.

Crow

300

An enemy or opponent.

Foe

300

A thing that someone says to cause amusement or laughter, especially a story with a funny punchline.

Joke
400

To such a great extent.

So

400

The passage which leads from the back of the mouth of a person or animal.

Throat

400

A piece of grassland, especially one used for hay.

Meadow

400

A woodwind instrument with a double-reed mouthpiece, a slender tubular body, and holes stopped by keys.

Oboe
400

A visible suspension of carbon or other particles in air, typically one emitted from a burning substance.

Smoke
500

A fertile spot in a desert, where water is found

Oasis

500

Come near or nearer to (someone or something) in distance or time.

Approach

500

Of little depth.

Shallow

500

Great sorrow or distress (often used hyperbolically).

Woe

500

An act of hitting or striking someone or something; a blow.

OR

A mark made by drawing a pen, pencil, or paintbrush in one direction across paper or canvas.  

Stroke