acorn

n. 橡实，橡子

achy, acid, acid rain, acidic, acidify, acidity, acidly, acidosis, acidulated, acidulous, acknowledge, acknowledged, acknowledgement, acknowledgement (also acknowledgment), acknowledging, acknowledgment, acme, acne, acolyte, aconite, acoustic, acoustically, acoustics, acquaint, acquaintance, acquaintant, acquainted, acquaintence, acquiesce, acquiescence, acquiescent, acquire, acquired, acquisition, acquisitive, acquisitively, acquisitiveness, acquit, acquittal, acre,