Two things are compared directly by using 'like' (A is like B.).
Other possibilities are for example:
- A is (not) like B
- A is more/less than B
- A is as … as B
- A is similar to B
- A is …, so is B
- A does …, so does B
- conrete box-style buildings are spreading like inkblots (3)
- The rabbit-hole went straight on like a tunnel (5)
- Personality is to a man what perfume is to a flower. (Charles Schwab)
- My friend is as good as gold.
see also: → Metaphor