list of synonyms of word inwardness

• kernel
• substance
• core
• center
• essence
• gist
• heart
• heart and soul
• marrow
• meat
• nub
• pith
• sum
• nitty-gritty
• content (generic term)
• cognitive content (generic term)
• mental object (generic term)

• cognitive state (generic term)
• state of mind (generic term)
• outwardness (antonym)

• position (generic term)
• spatial relation (generic term)
• outwardness (antonym)

• introversion (generic term)
• outwardness (antonym)