Declension table of gāyatra

Neuter	Singular	Dual	Plural
Nominative	gāyatram	gāyatre	gāyatrāṇi
Vocative	gāyatra	gāyatre	gāyatrāṇi
Accusative	gāyatram	gāyatre	gāyatrāṇi
Instrumental	gāyatreṇa	gāyatrābhyām	gāyatraiḥ
Dative	gāyatrāya	gāyatrābhyām	gāyatrebhyaḥ
Ablative	gāyatrāt	gāyatrābhyām	gāyatrebhyaḥ
Genitive	gāyatrasya	gāyatrayoḥ	gāyatrāṇām
Locative	gāyatre	gāyatrayoḥ	gāyatreṣu

Compound gāyatra -

Adverb -gāyatram -gāyatrāt