There are several synonyms for the phrase "be abundant." One such word is "prolific," meaning producing or yielding plentifully. "Copious" is another similar word, meaning abundant in supply or quantity. "Ample," "plentiful," and "bountiful" can also be used to describe a surplus of something. The word "profuse" suggests an abundance that is almost excessive or overflowing. "Generous" can be used to describe the act of being abundant or sharing abundance with others. "Lavish" suggests extravagance and excess in abundance. Finally, "teeming" can be used to describe an abundance that is active and bustling with life.