That is ample which gives a safe, but not a large, margin beyond a given demand; that is abundant, affluent, bountiful, liberal, plentiful, which is largely in excess of manifest need. Ample and abundant may be applied to any subject.

J. C. Fernald, English Synonyms and Antonyms (1914)

Example sentences

ample Ten million yen will be ample for the project.
plentiful For some, excuses are plentiful to remain idle.
copious Giraffes consume copious amounts of acacia leaves.
profuse He was profuse in his praise of his teacher.

Popularity over time

Word	1850 → 2019	Trend
abundant		falling
ample		falling
plentiful		falling
copious		steady
profuse		steady

Use in printed books, per decade from 1850 to 2019.

By length

4 letters: much¹, many², rich¹, rife¹
5 letters: thick¹, ample²
6 letters: plenty², lavish², galore²
7 letters: copious³, teeming², replete², profuse²
8 letters: numerous³, generous³
9 letters: plentiful³, exuberant⁴, bountiful³, abounding³, luxuriant⁴, bounteous, plenteous

The small number after each word is its number of syllables (many² = 2 syllables).

In other languages

Français: abondant
Italiano: abbondante
Español: abundante
Català: abundant