Since there is a hyphen joining the two words to become a single adjective( The noun has features of a caterpillar), this is one word.
It is one word.
Its one word
One, it's a compound word.
It is one word.
one word
It is one word
Schoolchildren, one word.
One word. 'Sandstorm.'
"Doorway" is one word.
It is one word.
Yes, daylight is one word!
It is one word.