- Compact
- Compact or firm
- Firm
- Firmly united
- Is old out firm
- Not hollow
- Precise
- Compact
- Compressed
- Compressed, thickset
- Concentrated but was slow to understand
- Dim-witted
- Impenetrable (jungle)
- Jam-packed
- Audio discs
- Audio discs (1,2)
- Compact discs
- Digitally-encoded discs
- Digitally-encoded discs (1,2)
- Music albums
- Music discs
- Concentrated more on extracting right needs
- More compact
- More difficult; more solid
- Muddled sender becomes more obtuse
- Thicker