Difference between Mill Around and Lurk

MILL AROUND vs LURK: NOUN

Lie in wait, lie in ambush, behave in a sneaky and secretive manner
Be about
Wait in hiding to attack
To remain concealed in order to ambush
To remain unobserved
To hang out or wait around a location, preferably without drawing attention to oneself
To view an internet forum without posting comments

To keep out of sight.
To lie hidden; to lie in wait.
To read but not contribute to the discussion in a newsgroup, chatroom, or other online forum.
To exist unobserved or unsuspected.
To move furtively; sneak.
To wait out of view.

To lie in concealment; hide or keep out of sight, as for ambush or escape; skulk.
To be latent or undisclosed; be withdrawn from open manifestation; exist unperceived or unsuspected.
To monitor a web forum or similar without making your presence pubilc
Be about a place without any apparent purpose

Puzzle over, Addlebrained, Mill about, Mess about, Lallygag, Hang around, Footle, Lurk, Lounge, Tarry, Loiter, Linger, Lollygag, Loaf, Mill

Mill about, Lie in wait, Mess about, Lallygag, Lounge, Ambuscade, Ambush, Scupper, Bushwhack, Lollygag, Tarry, Waylay, Loiter, Skulk, Linger

Puzzle over, Addlebrained, Mill about, Mess about, Lallygag, Hang around, Footle, Lurk, Lounge, Tarry, Loiter, Linger, Lollygag, Loaf, Mill

Mill around, Mill about, Mess about, Lie in wait, Lallygag, Hang around, Footle, Lounge, Ambush, Scupper, Lollygag, Tarry, Loiter, Skulk, Linger

Various crew mill around the sound stage, including the Director Martin Wood and Martin Lloyd.
Only their antennae twitched, but they did not move, did not mill around.
In the city centre of Charahi Ansari, under the mellow afternoon sun, families mill around shops, restaurants and kabab corners.
Michael Hampton founded his fiber mill around the same time that we got our first sheep, which was a fortuitous coincidence.
Within the first half a mile of Soda Lake Road, pronghorn antelope mill around a water trough.
Deer are browsers and will often mill around for hours before making it to their destination.
Several people mill around, sipping cocktails and making small talk.
Trojan armies mill around like sheep waiting to be milked.
Christmas revellers and hawkers mill around the cafe.

And inflation fears still lurk just below the surface.
Behind each tree or log might lurk a savage.
What may lurk beneath our toes in the surf?
Even worse, dangerous dancing adversaries lurk in the shadows!
Qaeda still lurk near the permeable Afghan border.
Highly accurate ballistic missiles lurk in every theater.
Core Rulebook IIIFearsome and formidable foes lurk within.
But the virus can lurk in dormant mosquitoes.
Remove any bruised areas where bacteria may lurk.
Nary Hungummory Poses the Question, Does Essential Savagery Lurk Beneath the Skin of Civilization, or Does Essential Civilization Lurk Beneath the Skin of Savagery?