What's the difference between somniloquence and somniloquous?

Somniloquence

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Definition:

• (n.) The act of talking in one's sleep; somniloquism.

Example Sentences:

• (1) Bruxism was reported most frequently (22%) followed by somniloquism (17%) and insomnia (14.9%).
• (2) Eight hundred and forty-six Chinese adolescents were surveyed concerning sleep behaviours including insomnia, nightmares, somniloquism, somnambulism, bruxism, and enuresis.

Somniloquous

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Definition:

• (a.) Apt to talk in sleep.

Example Sentences:

• (1) Bruxism was reported most frequently (22%) followed by somniloquism (17%) and insomnia (14.9%).
• (2) Eight hundred and forty-six Chinese adolescents were surveyed concerning sleep behaviours including insomnia, nightmares, somniloquism, somnambulism, bruxism, and enuresis.