Yes, "underground" is a compound word, formed by combining the words "under" and "ground."
Underground, background campground playground fairground foreground battleground
backgroundfairgroundforegroundgroundworkgroundbreakinggroundhoggroundskeepergroundswellgroundwaterplaygroundunderground
I think rainbow is a compound word because rain and bow is a word.
earthquake / earthworm / earthworks / earthman
No not exactly because if you say"spi/der" der is not a real word.
Underground.
Counterintelligence is a compound word with secondary stress.
No, "underground" is not a prefix. It is a compound word made up of the word "under" and "ground." A prefix is a type of affix that is added to the beginning of a word to change its meaning.
background campground foreground groundswell groundwork playground underground
Underground, background campground playground fairground foreground battleground
underground
backgroundfairgroundforegroundgroundworkgroundbreakinggroundhoggroundskeepergroundswellgroundwaterplaygroundunderground
No, building is not a compound word.
The contraction (not a compound word) is doesn't.
Upwards is a compound word.
There is no compound word.A compound word is a word like bus-stop.Husban is spelt like this husband
Upstairs is a compound word, so it is one word.