CAN YOU PLEASE HELP, ILL MARK AS BRAINLEIST

Answer:
Spacecraft
Explanation:
Compound words are formed when two or more words are joined together to create a new word that has an entirely new meaning. For example, “sun” and “flower” are two different words, but when fused together, they form another word, Sunflower.
So in this case the compound noun would be Spacecraft.
Hope this helps <3