Crossword of all Knowledge

Across:

4.	to deal or bargain
6.	satisfactory and economical to use
7.	vanish with the environment
11.	consisting of members or elements of different kinds
15.	unequivocally
16.	a reminder of a place visited
17.	a complete publication of generally less than 80 pages
18.	keenly watchful

Down:

1.	a figure cast on some surface by a body intercepting light
2.	amazing
3.	care or upkeep
5.	dining facility
7.	aggressive actions for a purpose
8.	to do a kindness or a favor to
9.	a member of a large group (usually in public)
10.	communication and contact between groups or units
12.	before the first
13.	officials and administrators
14.	higher than happiness
15.	speech