cigarette (esp. AmE) (usually cigarette packet in BrE)
blister
gift, sample (BrE)

contain sth

in a/the pack
How many needles are there in a pack?

pack of
It comes in packs of six.
a pack of cigarettes
a pack of gum

action, information, resource (BrE), starter, training (BrE)

contain sth, include sth
Your information pack includes addresses of leading manufacturers.

heavy
fanny (AmE)
battery, power
a rechargeable battery pack

carry, sling

animal, horse, mule

in a/the pack
The water in his pack made it very heavy.

wolf
hunting
brat (= a group of famous young people who sometimes behave badly)

lead

instinct

in a/the pack
the dominant animal in the pack

in packs
The animals hunt in packs.

pack of
a pack of dogs/wolves

the leader of the pack

shuffle
cut

in a/the pack
There are 52 playing cards in a pack.

the bottom of the pack, the top of the pack
Take a card from the top of the pack.

a pack of cards

carefully, neatly
tightly
Live animals are transported across the continent, packed tightly into trucks.

quickly
away, together, up
The passengers were packed together like cattle.
I think we might as well pack up and go home.

in, into
She packed her clothes into a suitcase.

into
Crowds of people packed into the hall.

be packed full of sth
Our new brochure is packed full of inspirational ideas.

be packed out (esp. BrE)
The stadium was packed out.

be packed to bursting (esp. BrE), be packed to capacity, be packed to overflowing (esp. BrE)
The hall was packed to capacity.

be packed to the brim, be packed to the gills, be packed to the rafters (esp. BrE)
The hostel was packed to the rafters.

be packed with sb
The place was packed with conference attendees.

closely packed, densely packed, tightly packed

Pack is used with these nouns as the subject:
fan

Pack is used with these nouns as the object:
backpack, bag, basket, belongings, box, clothes, crate, grocery, hall, luggage, parachute, picnic, punch, rucksack, shelf, stadium, street, suitcase, tent, thing, trunk, venue