Declension table of ?spardhana

Neuter	Singular	Dual	Plural
Nominative	spardhanam	spardhane	spardhanāni
Vocative	spardhana	spardhane	spardhanāni
Accusative	spardhanam	spardhane	spardhanāni
Instrumental	spardhanena	spardhanābhyām	spardhanaiḥ
Dative	spardhanāya	spardhanābhyām	spardhanebhyaḥ
Ablative	spardhanāt	spardhanābhyām	spardhanebhyaḥ
Genitive	spardhanasya	spardhanayoḥ	spardhanānām
Locative	spardhane	spardhanayoḥ	spardhaneṣu

Compound spardhana -

Adverb -spardhanam -spardhanāt