What is a Mono Word™?

Question

_{This is in the spirit of the What is a Word/Phrase™ series started by JLee with a special brand of Phrase™ and Word™ puzzles.}

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If a word conforms to a special rule, I call it a Mono Word™.
Use the following examples below to find the rule.

Mono Words	Not Mono Words
VERB	NOUN
SALON	SALOON
MENTAT	MENTAL
BREW	DREW
NUMB	NAME
ALM	ALMA MATER
JUDGE	JUDGED
ARK	LARK
LOSS	LOSE
LEMON	MELON

Text version:

Mono Words,Not Mono Words
VERB,NOUN
SALON,SALOON
MENTAT,MENTAL
BREW,DREW
NUMB,NAME
ALM,ALMA MATER
JUDGE,JUDGED
ARK,LARK
LOSS,LOSE
LEMON,MELON

Answer 1

Mono words:

Can be found in the names of books of the Bible.

Thus:

VERB in PROVERBS
SALON in 1&2 THESSALONIANS
MENTAT in LAMENTATIONS
BREW in HEBREWS
NUMB in NUMBERS
ALM in PSALMS
JUDGE in JUDGES
ARK in MARK
LOSS in COLOSSIANS
LEMON in PHILEMON

As for the name:

Possibly because Christianity is a MONOtheistic religion? Or because of SONG OF SOLOMONOMONOMON... ;-)