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All answers having "Words to live by" as clue:

4 Character Answers:

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LAWS

OATH



5 Character Answers:

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ADAGE

AXIOM

CREDO

CREED

DOGMA

MAXIM

MORAL

MOTTO

TENET



6 Character Answers:

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ADAGES

AXIOMS

CREDOS

CREEDS

MANTRA

MOTTOS

TENETS



7 Character Answers:

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MOTTOES

SLOGANS



10 Character Answers:

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GOLDENRULE