Tiny, miniscule, minute, microscopic.
Nanosize means very small. It is something that is on a very small scale and is measured in nanometers.
No room to swing a cat referers to a very small area.
A crumb, a very small amount.
The word little is an adjective. It describes something that is small in size (little girl little box).An adjective as in 'small in size'. A pronoun as in 'a small amount of'. An adverb as in 'a small extent'.
Moderate. The others mean small but moderate means medium.
The prefix "micro-" means small or tiny. It is commonly used in words to indicate something of a very small size or scale.
TinyMiniLittleTeenyMidget
very small
A very very small unit
Small
pettite small
Nanosize means very small. It is something that is on a very small scale and is measured in nanometers.
0.0000000000000000000000000000000000001 is a very small decimal number. ^^
A grotto.
tiny
No room to swing a cat referers to a very small area.
Some words that mean a small cave are grotto, cavern, and den.