✅ Opportune means suitable or appropriate, often in regard to timing (an opportune remark).

✅ Felicitous means fitting, apt, or appropriate (You brought me a coffee at a felicitous moment).

✅ These words have very similar meanings, but they have different connotations.

✅ Felicitous suggests some element of luck or chance, whereas opportune suggests timeliness in a way that doesn’t rely on chance (a felicitous change in the weather; The note came at an opportune time).

✅ Shelter means to protect, especially from or as if from bad weather, attack, or similar (I shelter stray animals).

✅ Harbor means to offer refuge or protection to a person or to a feeling in the mind (He’d been harboring doubt about his cousin for years).

✅ Both shelter and harbor can also mean to conceal, hide, or illicitly protect people who are in danger.

✅ Harbor is used more often in this sense than shelter (She was known to shelter runaways; The community harbored criminals).

✅ Paradise refers to a place that offers happiness, delight, or bliss (The spa was a complete paradise).

✅ Utopia refers to an ideal, imagined place, especially one which is politically or socially perfect (We’re not living in a utopia where everyone has the same opportunities).

✅ Paradise particularly suggests a heavenly environment, whereas utopia suggests a place that has a perfect political or social system.

✅ Both words can also refer to more mundane environments that are in some way perfect, ideal, or fun within a specific context (The store was a musician’s paradise; This is utopia for anyone who likes sports).