big, bulky, compact, neat, small
wrapped
plastic (AmE)
cigarette (AmE) (usually cigarette pack in AmE, cigarette packet in BrE), food
suspect (BrE), suspicious
Police destroyed the suspicious package in a controlled explosion.

open, unwrap, wrap
mail (AmE), post (BrE), send
deliver
receive, sign for

contain
arrive

in a/the package
I sent the books in one big package.

package of
a package of cookies/meat (AmE)

basic
complete, comprehensive, entire, full, integrated, overall, total, whole
attractive, excellent, generous
reform
benefits, compensation, financial, incentive, pay, remuneration
a comprehensive benefits package

retirement, travel, vacation
redundancy (BrE), severance
aid, assistance, rescue
training

offer, produce, provide, put together
The IMF has put together a rescue package for the country's faltering economy.

accept, approve
reject

consist of sth, contain sth, include sth
be aimed at sth
a jobs package aimed at helping the unemployed

holiday (BrE), tour
deal

in a/the package
the measures included in the package

under a/the package
Under the reform package, spending on health will increase.

package of
a package of measures to assist industry

part of a package
The pay freeze forms part of a package of budget cuts.

software
integrated
an integrated business software package

application, desktop-publishing, drawing, graphics, word-processing
accounting, business

download, install
use
develop