overact, overreact

Overact or overact, said of actors or entertainers, means to emote, or to project more emotion than is realistic--
He tends to overact, even on the stage; he'll really have to tone it down for the camera.
Try not to overact, it makes the whole scene unconvincing.

Overreact or overreact means to blow things out of proportion, possibly by showing more emotion than the situation warrants--
I wish she wouldn't overreact every time some little thing goes wrong--I think she needs a psychiatrist.
Let's hope he doesn't overreact the way he did the last time we were late--he got hysterical, remember?

Now that you know that, you can say--
"I'm afraid she'll overreact if I tell her not to overact--you tell her, but be tactful."

also, all so

Also or also ( one word ) means in addition to, or besides--
I'll have a cup of coffee, also.
Not only were they late, but they were also rude.
It's not only useful, but also beautiful.

All so or all so ( two words ) means the entirety; the whole quantity or amount; everyone ( all ), to such an extreme or in such an amount; thus or in this manner ( so )--
We were all so upset that no one noticed it.
They were all so tired, that no one minded sleeping on the floor.
These people are all so rude!
It's all so sudden!
"It's all so beautiful..."

Now that you know that, you can say--
"We were all so distracted that we forgot our bags, and also our tickets."

crude, crewed

Crude or crude means unrefined or raw, literally or figuratively--
The price of crude oil often makes the headlines.
He was a crude and boorish person, and often gave offense to those around him.

Crewed or crewed is the past tense ( yesterday, or some time ago ) of "crew", meaning to hire or employ a group of people, for work, sport, or military purposes--
He crewed his ship with only the hardiest of sailors.
Crewed may also be the past tense of "crew", meaning to serve as a member of a work, sport, or military group--
The sailor had crewed under this captain before, and knew what to expect.

Now that you know that, you can say--
"The men who crewed the oil tankers were a crude lot, but they got along together fairly well."

of course, off course

Of course or of course means assuredly, certainly, or in the natural order of things--
Of course you're welcome to stay to dinner.
He forgot to return the call, of course.

Off course or off course means headed in the wrong direction, or deviating from a planned route, literally or figuratively--
Captain, the ship seems to be off course--we should have sighted land by now.
His life has been off course since he dropped out of school.

Now that you know that, you can say--
"We were due at noon, but of course we will arrive a few hours later, since the ship was off course."

resign, reassign, re-sign

Resign or resign ( z sound ) means to give up a position or job--
He threatened to resign if he didn't get a raise in salary.
The officer wanted to resign his commission, but he had no civilian job prospects.
Resign also means to submit without resistance, in a mental way--
He'll just have to resign himself to the fact that she's gone.

Reassign or reassign means to appoint to a specific duty or post ( assign ), again or anew ( re-)--
He thinks they will reassign him to an overseas post.
If they agree to reassign him, he'll be working closer to home.
Reassign or reassign may also mean allocate or allot ( assign ), again or anew ( re-)--
I hope the clerk can reassign the rooms; we were promised a view.

Re-sign or re-sign ( s sound ) means to write one's name ( sign ) again ( re-), thereby agreeing to the terms and conditions of a contract--
We have altered the contract; you'll need to re-sign where indicated.
Now read the terms and conditions and re-sign the form.

Now that you know that, you can say--
"He won't re-sign with us unless we reassign him, otherwise he'll resign."

tendon, tenon

Tendon or tendon means a cord of tissue that connects a muscle to a bone--
A tendon is one of the parts of the human body.
She strained a tendon and was on crutches for months.
Tendon may also mean a strand used to reinforce concrete--
This piece of concrete has a tendon running through it; it will be tough to dig up.

Tenon or tenon means a projection on the end of a piece of wood, used to join it to another piece of wood with a mortise, like a tab in a slot--
Each piece of wood is joined with a mortise and tenon; it's very sturdy.
An Amish barn may use mortise and tenon construction.

Now that you know that, you can say--
"He climbed the ladder to check on a mortise and tenon joint, then he slipped and tore a tendon in his shoulder--the same joint he had injured before."

dragon, drag on, drag in

Dragon or dragon ( one word ) means the mythological beast, possibly fire-breathing--
He plays a computer game in which he is the knight who slays the dragon and rescues the fair maiden.
We all like to see the dragon during the Chinese New Year festival.

Drag on or drag on ( two words ) means to pull heavily or slowly; to draw along the ground or floor ( drag ) over or atop a space, place, or substance ( on ) --
We're supposed to carry the bride's train, so it doesn't drag on the floor.
We shouldn't let the flag drag on the ground.
Drag on may be used figuratively, to describe an event that passes slowly or tediously--
The meeting seemed to drag on for hours.
The afternoon seems to drag on when you watch the clock.

Drag in or drag in ( two words ) means to pull heavily or slowly; to draw along the ground or floor ( drag ) within a space, place, or substance ( in ) --
Don't let your coat drag in the mud!
Pick that up, so it doesn't drag in the puddle.
Drag in may be used figuratively, meaning to introduce irrelevant matter into a discussion--
He always has to drag in that proposition we voted down months ago.
Do you have to drag in that old argument every time we have something to discuss?

Now that you know that, you can say--
"The parade seemed to drag on while we waited for the dragon, moving slowly so that its tail wouldn't drag in the mud."

Note--not to be confused with "dragging", a participle of "drag", meaning to pull heavily or slowly along the floor or ground--
Tell him to stop that; he's dragging it in the mud.