Cases of word usage

1) the noise made when clearing the throat or to get a person's attention (ahem)

2) the mark *, used to call attention to something, to show that letters are emitted etc (asterisk)

3) able to work or be operated without attention (automatic)

4) the use of machines needing little or no attention in industry (automation)

5) a number of people or things receiving attention as a group (batch)

6) serious attention or effort (care)

7) (of a person) thinking of, paying attention to, what one does, says etc (careful)

8) the act of paying attention (to avoid danger or making mistakes) (caution)

9) to keep one's attention on something (concentrate)

10) the act of giving attention to, thinking about, something (consideration)