Spice is the singular form for the plural noun spices.
The word spices is also a verb (spice, spices, spicing, spiced).
spice
The singular form of feet is foot.
The singular form is hilum.
The form plumber is the singular form; the plural form is plumbers.
The singular form would be majesty.
The noun grandmother is the singular form.
The singular form of the demonstrative pronoun 'these' is this.
The singular form of "that" is "it."
The singular form of "cuffs" is cuff.
The singular form of "stratum" is "stratum." The word does not change in its singular form.
The singular form of feet is foot.
The singular form of scissors is "scissor."
The singular form of diagnoses is diagnosis.
The singular form of "wash" is "washing."
The singular form of "dice" is "die."
The singular form of "oases" is "oasis."
The singular form of vixen is "vixen." Both the singular and plural form of this word are the same.
The singular form of "curricula" is "curriculum."