spontaneously

As adverbs the difference between autonomously and spontaneously

is that autonomously is in an autonomous or self-governing manner while spontaneously is in a spontaneous manner; naturally; voluntarily.

As adverbs the difference between instantly and spontaneously

is that instantly is (archaic) urgently; with insistence while spontaneously is in a spontaneous manner; naturally; voluntarily.

As an adverb spontaneously

is in a spontaneous manner; naturally; voluntarily.

As an adjective undefined is

lacking a definition or value.

As adverbs the difference between spontaneously and memorably

is that spontaneously is in a spontaneous manner; naturally; voluntarily while memorably is in a memorable manner.

As adverbs the difference between spontaneously and instantaneously

is that spontaneously is in a spontaneous manner; naturally; voluntarily while instantaneously is without any delay; in an instantaneous manner.

Spontaneously is a related term of largely.

As adverbs the difference between spontaneously and largely

is that spontaneously is in a spontaneous manner; naturally; voluntarily while largely is in a widespread or large manner.

Spontaneously is a related term of bounteously.

As adverbs the difference between spontaneously and bounteously

is that spontaneously is in a spontaneous manner; naturally; voluntarily while bounteously is in a bounteous manner.

Spontaneously is a related term of bountifully.

As adverbs the difference between spontaneously and bountifully

is that spontaneously is in a spontaneous manner; naturally; voluntarily while bountifully is in a bountiful manner.

As adverbs the difference between unaffectedly and spontaneously

is that unaffectedly is in an unaffected manner sincerely and genuinely not artificially while spontaneously is in a spontaneous manner; naturally; voluntarily.