Word: groundbursts
Part of speech: Noun
Syllables: ground
bursts
Definition: Plural of groundburst; the detonation of an explosive device such as an  artillery shell, nuclear weapon or air-dropped bomb that explodes upon hitting the ground
Morphemes:
Affix: ground
Language: en
PoS: Verb
Meaning: To place something on the ground.
Affix: burst
Language: en
PoS: Noun
Meaning: The explosion of a bomb or missile.
Affix: -s
Language: en
PoS: Suffix
Meaning: Used to form regular plurals of nouns.