✅ Sleepy refers to being tired or drowsy (I felt too sleepy to go out).

✅ Lethargic refers to being sluggish or lacking energy (I always feel lethargic before my morning coffee).

✅ Sometimes, when feeling sleepy, you might also feel lethargic. However, lethargic doesn’t necessarily mean that you’re tired.

✅ Instead, lethargic might suggest feeling ill or run-down or lacking energy and enthusiasm (I always feel lethargic in winter).

✅ Endurance refers to the ability to continue or last in adverse conditions (They showed great endurance in remaining positive through hard times).

✅ Vitality refers to the ability to survive, particularly while remaining viable or meaningful (It’s important to support the vitality of our town).

✅ Both these terms refer to the ability to survive.

✅ In this sense, vitality is often used of things, like institutions and languages, whereas endurance can be used to refer to people.

✅ Devotion refers to an earnest sense of loyalty to a cause or person (She showed enormous devotion to her pets).

✅ Attachment refers to a strong emotional bond to a person, cause, or ideal (I had a particular attachment to honey bee conservation).

✅ Both these terms refer to a feeling of being bonded to someone or something in a positive sense.

✅ Attachment emphasizes the sense of a bond, whereas devotion emphasizes feelings of love, loyalty, and dedication (I feel attachment to even my distant relatives; I expressed my devotion to the cause).