✅ Solely means only or not involving anyone or anything else (She was solely responsible for the project).

✅ Exclusively means limited to only one person, group, or thing (This offer is exclusively for members).

✅ Both words mean limited to one person or thing.

✅ Solely emphasizes single responsibility or involvement, while exclusively often implies special access or privilege (He solely handled the arrangements; The club is exclusively for VIPs).

✅ Greasy means covered with or resembling oil or fat (The fries were too greasy).

✅ Oleaginous means having the nature or qualities of oil, often excessively so (The oleaginous feel of the lotion was unpleasant).

✅ Both words describe something oily or slick.

✅ Greasy is commonly used to describe food or surfaces, while oleaginous can be used more broadly for things like paintings, puddles, sewages, and more. Both words are also used to describe people who are unpleasantly slick and smooth-talking.

✅ To delay is to make someone or something late or slow (I delayed my friend from getting home on time because I had so much to tell her).

✅ To pigeonhole means to set something aside with the intention of dealing with it later (They pigeonholed the proposal for the following month).

✅ Both words involve postponing action or attention.

✅ Delay often implies an unavoidable or external cause, while pigeonhole suggests an intentional choice to defer action (We delayed the meeting due to weather; The committee decided to pigeonhole the bill until next year).