WORD FORMS 1	WORD FORMS 4
1. hypnosis	1. commands
2. to agree	2. comparisons with
3. trust	3. Investment / Investing (see 2)
4. logical	4. be memorized / have been memorized
5. true	5. resistance
WORD FORMS 2	WORD FORMS 5
1. commanding	1. hypnotize
2. comparable to	2. agreeing with / in agreement with
3. investors	3. trusty
4. memorized	4. resistance to
5. irresistible	5. memorization (see 3)
WORD FORMS 3	WORD FORMS 6
1. hypnotic	1. logic
2. Agreement on / Agreeing on	2. Truly, / Truthfully, (see 4)
3. trustingly (see 1, below)	3. a command (see 5)
4. logically	4. comparative
5. true	5. an investment in

NOTES

1. Collins COBUILD: Someone who is trustful trusts other people easily; a rather old-fashioned word.

2. "Investing" is preferred to "to invest" because of the following noun phrase (not infinitive verb phrase) "the best way," and also because the -ing form is generally more commonly used than the to-infinitive form. (From The Grammar Book.)

3. You can say "memorizing" if you do not use the preposition "of."

4. If that comma isn't on your test paper you will lose one point.

5. We need to add "obviously" just before "to you" if we want the content of this sentence to be correct.