Front

defender, supporter; to support, recommend

Back

advocate

Front

Assume, expect, think ahead:

Back

anticipate

Front

notion, idea

Back

concept

Front

to differ, disagree with, say the opposite

Back

contradict

Front

Used for flavoring; to remove

Back

extract

Front

Foundation; essential part, skill, or fact.

Back

fundamental

Front

Lack of information or knowledge

Back

ignorance

Front

initial, first, introductory

Back

preliminary

Front

Statement on which an argument is based

Back

premise

Front

Hold, keep, or save; continue to have.

Back

retain