Units 1-3

Front

Accomplish

Back

Achieve with effort

Front

Combination

Back

An assemblage of separate parts or qualities

Front

Crucial

Back

Of extreme importance; vital to the resolution of a crisis

Front

Duplicate

Back

Make a copy of

Front

Emerge

Back

Come out into view, as from concealment

Front

Independent

Back

Free from external control and constraint

Front

Overcome

Back

Get on top of; deal with successfully

Front

Peculiar

Back

Beyond or deviating from the usual or expected

Front

Perplex

Back

Be a mystery or bewildering to

Front

Sparse

Back

Not a lot of, near empty, not plentiful