1. Sole 2. Single 3. Exclusive 4. Mere 5. Just
1. Happen 2. Take place 3. Come about 4. Arise 5. Transpire
1. Barrier 2. Hurdle 3. Impediment 4. Bar 5. Difficulty
1. Thing 2. Article 3. Entity 4. Item 5. Subject
1. Shade 2. Tint 3. Subtlety 4. Distinction 5. Gradation
1. Observed 2. Recorded 3. Marked 4. Registered 5. Recognized
1. Notice 2. Mark 3. Memo 4. Comment 5. Annotation
Reminiscence Longing Sentimentality Yearning Retroactive
Indifferent Apathetic Casual Cool Detached
Following Subsequent Successive Immediately following