Word: horseriders
Part of speech: Noun
Syllables: hor
se
ri
ders
Definition: Plural of horserider;  includes the disciplines of riding, driving, and vaulting
Morphemes:
Affix: horse
Language: en
PoS: Verb
Meaning: To get on horseback.
Affix: ride
Language: en
PoS: Noun
Meaning: An instance of riding.
Affix: -er
Language: en
Meaning: agent noun
Etymology Compounds: Affix: -ārius
Language: la
Decoded: -arius
PoS: Suffix
Meaning: -er; Used to form nouns denoting an agent of use, such as a dealer or artisan, from other nouns.
Affix: -s
Language: en
PoS: Suffix
Meaning: Used to form regular plurals of nouns.