Sleep Word Search
Play a Sleep word search free online. We built the 12-word list around the parts and systems of the human body, then scattered it across a 15×15 grid — horizontal, vertical and diagonal. Find them all to clear the board.
Words to find: BRAIN, SKULL, CRANIUM, CEREBRUM, CEREBELLUM, THALAMUS, PINEAL, MELATONIN, CIRCADIAN, CORTEX, NEURON, SYNAPSES.
Every word on the list appears exactly once. Words can run forwards or backwards, so scan both directions before you move on.
Sleep word list, defined
- BRAIN /breɪn/ · noun (also verb)
- The organ of soft nervous tissue contained in the skull of vertebrates, functioning as the coordinating center of sensation and intellectual and nervous activity. Informally, it also refers to a person's intellectual capacity or a very intelligent person. Related: mind, intellect, cerebrum, grey matter.
- SKULL /skʌl/ · noun
- The bony structure forming the upper part of the head, containing the brain, or a human skull, especially when used as a container for the head of a person who has been hanged. Related: cranium, head, bone, skeleton.
- CRANIUM /ˈkreɪ.ni.əm/ · noun
- The bony structure that encloses and protects the brain; the upper part of the skull. Related: skull, braincase, head.
- CEREBRUM /ˈsɛrɪbrəm/ · noun
- The cerebrum is the largest and most highly developed part of the brain, consisting of two hemispheres and responsible for higher functions such as thought, reasoning, memory, and voluntary movement. Related: brain, cerebral cortex, grey matter, encephalon.
- CEREBELLUM /ˌsɛrəˈbɛləm/ · noun
- The large, ridged structure at the back of the brain, below the cerebrum, responsible for coordinating voluntary movement, balance, and posture. Related: little brain.
- THALAMUS /θəˈleɪməs/ · noun
- A small, oval-shaped structure in the brain that relays sensory and motor signals to the cerebral cortex. It plays a crucial role in regulating consciousness, sleep, and alertness. Related: relay station, sensory center, brain structure, neural hub.
- PINEAL /ˈpaɪnɪəl/ · noun
- A small endocrine gland in the vertebrate brain that produces melatonin and regulates the sleep-wake cycle. It is also a term used in mysticism and spirituality to refer to a supposed seat of the soul. Related: endocrine gland, epiphysis, third eye, glandula pinealis.
- MELATONIN /mɛləˈtoʊnɪn/ · noun
- A hormone produced by the pineal gland that regulates sleep-wake cycles. It is often taken as a dietary supplement to help with sleep disorders. Related: serotonin, insulin, adrenaline, growth hormone.
- CIRCADIAN /sɜːˈkeɪdiən/ · adjective
- Relating to biological processes that recur naturally on an approximately twenty-four-hour cycle, even in the absence of external cues such as light. Related: daily, 24-hour.
- CORTEX /ˈkɔːr.tɛks/ · noun
- The outer layer of an organ or structure, especially the deeply folded grey matter covering the cerebrum of the brain, responsible for higher functions such as thought, language, memory, and perception. Related: outer layer, grey matter, mantle, covering.
- NEURON /njuːrɒn/ · noun
- A cell in the nervous system that processes and transmits information through electrical and chemical signals. Neurons are the basic building blocks of the brain and nervous system. Related: nerve cell, ganglion cell, neuroglia, synapse.
- SYNAPSES /sɪˈnæpsɪz/ · noun
- A synapse is a small gap between two neurons across which chemical signals pass. It is the site of neurotransmission. Related: connections, links, bridges, junctions.
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