fortuitous

As adjectives the difference between fortuitous and persistent

is that fortuitous is happening by chance; coincidental or accidental while persistent is obstinately refusing to give up or let go.

As adjectives the difference between fortuitous and unfavorable

is that fortuitous is happening by chance; coincidental or accidental while unfavorable is disadvantageous, adverse, unsuitable, inconducive; serving to hinder or oppose.

As adjectives the difference between gratuitous and fortuitous

is that gratuitous is given freely; unearned while fortuitous is happening by chance; coincidental or accidental.

As adjectives the difference between fortuitous and planned

is that fortuitous is happening by chance; coincidental or accidental while planned is existing or designed according to a plan.

As a verb planned is

(plan).

As an adjective fortuitous

is happening by chance; coincidental or accidental.

As a noun happenstance is

(countable) a chance or random event or circumstance.

As adjectives the difference between inherent and fortuitous

is that inherent is inherent while fortuitous is happening by chance; coincidental or accidental.

As adjectives the difference between advantageous and fortuitous

is that advantageous is being of advantage, beneficial while fortuitous is happening by chance; coincidental or accidental.

As an adjective fortuitous

is happening by chance; coincidental or accidental.

As an adverb randomly is

in a random way.

As adjectives the difference between providential and fortuitous

is that providential is pertaining to divine providence while fortuitous is happening by chance; coincidental or accidental.

As adjectives the difference between fluky and fortuitous

is that fluky is while fortuitous is happening by chance; coincidental or accidental.