Here is a list of 40 words in English that have deep meanings, based on some web sources¹²³:

• Bibliopole: a dealer in books, especially rare or decorative ones.
• Callipygian: having shapely buttocks.
• Sabaism: the worship of stars or spirits in them, especially as practiced in ancient Arabia and Mesopotamia.
• Mundivagant: archaic word for “wandering over the world.”
• Woodnote: a natural and untrained musical note resembling the song of a bird.
• Luminescence: the emission of light by a substance that has not been heated, as in fluorescence and phosphorescence.
• Denouement: the outcome of a complex sequence of events.
• Effervescence: the property of forming bubbles (or an appealingly lively quality).
• Phosphenes: an impression of light that occurs without light entering the eye. It’s usually caused by stimulation of the retina (as by pressure on the eyeball when the lid is closed).
• Audacity: the confidence to say or do what you want, despite difficulties, risks, or the negative attitudes of other people.
• Desiderium: an ardent desire or longing (a feeling of loss or grief for something lost).
• Ataraxia: calmness untroubled by mental or emotional disquiet.
• Somnambulance: walking while asleep.
• Psithurism: the sound of the wind rustling the leaves.
• Lore: traditional knowledge about nature and culture that people get from their parents and other older people, not from books.
• Ardor: an often restless or transitory warmth of feeling or extreme vigor and energy.
• Alchemy: studies about substances through which the generation of gold and silver may be artificially accomplished.
• Caravan: a company of travelers on a journey through a desert or hostile region.
• Macabre: having death as a subject: comprising or including a personalized representation of death.
• Serendipity: the faculty or phenomenon of finding valuable or agreeable things not sought for.
• Synchronicity: the coincidental occurrence of events and especially psychic phenomena (such as similar thoughts in widely separated persons or a mental image of an unexpected event before it happens). They seem related but are not explained by conventional mechanisms of causality.
• Sidereal: relating to, or expressing about stars or constellations.
• Ascendant: rising in power or influence.
• Benevolent: kind and generous.
• Bountiful: giving or providing many desired things.
• Bubbly: lively and cheerful.
• Chivalrous: showing respect and courtesy, especially toward women.
• Conscientious: careful and diligent.
• Dazzling: extremely bright or impressive.
• Jubilant: feeling or expressing great joy.
• Ineffable: too great or extreme to be expressed or described in words.
• Insouciance: a casual lack of concern or indifference.
• Quintessential: representing the most perfect or typical example of a quality or class.
• Rapturous: characterized by, feeling, or expressing great pleasure or enthusiasm.
• Sanguine: optimistic or positive, especially in a difficult situation.
• Saturnine: gloomy or sullen.
• Schwellenangst: fear of crossing a threshold to embark on something new.
• Somnambulist: a person who walks in their sleep.
• Sonder: the realization that each random passerby is living a life as vivid and complex as your own.
• Vellichor: the strange wistfulness of used bookstores, which are somehow infused with the passage of time.