Difference between Relax and Loosen Up

RELAX vs LOOSEN UP: NOUN

Make less active or fast
Become loose or looser or less tight
Make less tight
Become less tense, rest, or take one's ease
Cause to feel relaxed
Become less tense, less formal, or less restrained, and assume a friendlier manner
Become less severe or strict
Make less severe or strict
To relieve (something) from stress.
To become more lenient.
To make something (such as codes and regulations) more lenient.
To become less severe or tense.
To make something less severe or tense.
To become loose.
To make something loose.
To calm down.
Make less taut

To relax, act less seriously.
To become loose; to loosen
Cause to feel relaxed
Make one's body limber or suppler by stretching, as if to prepare for strenuous physical activity
Cause to become unblocked
Become less tense, rest, or take one's ease
Become less tense, less formal, or less restrained, and assume a friendlier manner

To make lax or loose; to make less close, firm, rigid, tense, or the like; to slacken; to loosen; to open
To make less severe or rigorous; to abate the stringency of; to remit in respect to strenuousness, earnestness, or effort
To relieve from constipation; to loosen; to open.
Hence, to relieve from attention or effort; to ease; to recreate; to divert.

To abate in severity; become more mild or less rigorous.
To remit in close attention; unbend.
To divert, recreate.
To mitigate, ease.
Relaxed; loose.
Synonyms To loose, unbrace, weaken, enervate, debilitate.
To set loose or free; give up or over.
To become loose, feeble, or languid.
To make less severe or rigorous; remit or abate in strictness: as, to relax a law or rule.
To remit or abate in respect to attention, assiduity, effort, or labor: as, to relax study; to relax exertions or efforts.
To relieve from attention or effort; afford a relaxation to; unbend: as, conversation relaxes the mind of the student.
To abate; take away.
To relieve from constipation; loosen; open: as, medicines relax the bowels.
To slacken; make more lax or less tense or rigid; loosen; make less close or firm: as, to relax a rope or cord; to relax the muscles or sinews.

Ease, Chill, Lighten, Breathe, Relaxation, Unstrain, Unlax, Make relaxed, Slow down, Loosen up, Loose, Unbend, Loosen, Decompress, Unwind

Fatten up, Eke out, Morning sickness, Sniff out, Unstuff, Unstrain, Unlax, Make relaxed, Limber up, Decompress, Unbend, Unwind, Relax, Slow down, Warm up

Easing, Relieve, Cool, Soften, Calm, Ease, Chill, Breathe, Relaxation, Slow down, Loosen up, Loose, Unbend, Loosen, Decompress

Wipe away, Make headway, Body odor, Snuff out, Sit tight, Fatten up, Eke out, Morning sickness, Sniff out, Limber up, Decompress, Unbend, Relax, Slow down, Warm up

Thank you for making me laugh and relax!
Lay back, relax, and prepare to look radiant.
Man, you need to seriously relax a little!
So sit back, relax, and check it out!
Restaurants and to the beach or exploring out in the Village, relax in the Village, relax in utmost!
Relax and unwind in a comfortable clean area after a day of exploring or use the pool or BBQ area to relax.
You can pitch your tent, relax in a caravan, or relax in a self catering tourist lodge or motel unit.
This procedure, with sufficient practice, can allow you to relax generalized residual tension down to zero, thus helping to really relax your whole body.
Instead of needing to be comfortable to relax, we learn to relax with discomfort.
RELAX NG: Unification of RELAX Core and TREX.

Your muscles really loosen up in heated water.
Great reminder to loosen up and have fun!
Do easy stretches to loosen up your muscles.
The straps can loosen up as you drive.
NEVER had one loosen up since I changed.
Turn the speakers up a little louder than you normally would will help loosen up the material.
Things are stating to loosen up as state parks and boat launches open up.
In sum, my internal workplace advice is: open up, loosen up, listen up, speak up, and don't work weekends on anything you don't enjoy.
However, they tend to loosen up after washing up for a few times.
Should I dig up and loosen up the rootball?