stand vs straighten up

verb

To have or maintain a position, order, or rank; to be in a particular relation.
To be valid.
Of a ship or its captain, to steer, sail (in a specified direction, for a specified destination etc.).
To be placed in an upright or vertical orientation.
To be consistent; to agree; to accord.
To remain without ruin or injury.
To place in an upright or standing position.
To maintain one's ground; to be acquitted; not to fail or yield; to be safe.
To appear in court.
To stop asking for more cards; to keep one's hand as it has been dealt so far.
To be positioned to gain or lose.
To undergo; withstand; hold up.
To support oneself on the feet in an erect position.
To remain motionless.
To be present, to have welled up.
To occupy or hold a place; to be set, placed, fixed, located, or situated.
To measure when erect on the feet.
To be a candidate (in an election).
To act as an umpire.
To oppose, usually as a team, in competition.
To tolerate.
To cover the expense of; to pay for.
To maintain an invincible or permanent attitude; to be fixed, steady, or firm; to take a position in resistance or opposition.
To rise to one’s feet; to stand up.

noun

A designated spot where someone or something may stand or wait.
A particular grove or other group of trees or shrubs.
A single set, as of arms.
The act of standing.
A contiguous group of trees sufficiently uniform in age-class distribution, composition, and structure, and growing on a site of sufficiently uniform quality, to be a distinguishable unit.
A small building, booth, or stage, as in a bandstand or hamburger stand.
An advertisement filling an entire billboard, comprising many sheets of paper.
A partnership.
A defensive position or effort.
A young tree, usually reserved when other trees are cut; also, a tree growing or standing upon its own root, in distinction from one produced from a scion set in a stock, either of the same or another kind of tree.
The platform on which a witness testifies in court; the witness stand or witness box.
An area of raised seating for waiters at the stock exchange.
A device to hold something upright or aloft.
A period of performance in a given location or venue.
A standstill, a motionless state, as of someone confused, or a hunting dog who has found game.
Grandstand. (often in the plural)
A type of supernatural ability from the anime and manga series JoJo's Bizarre Adventure, named for the fact that they appear to 'stand' next to their user.
A location or position where one may stand.
A resolute, unwavering position; firm opinion; action for a purpose in the face of opposition.

verb