mortarboard
Word family nounmortarmortarboard
College
mor·tar·board /ˈmɔːtəbɔːd $ ˈmɔːrtərbɔːrd/ noun [countableC] 
SECa black cap with a flat square top worn by members of some universities on formal occasions 学士帽，学位帽 →5 see picture at 见图 hat- strange bedfellows
- strangely
- strangely
- strangely enough
- strangely/oddly/curiously etc enough
- strangeness
- strangenesses
- stranger
- stranger
- strangers
- strangers' gallery
- strangers'-gallery
- strangers'gallery
- Strangers' Gallery, the
- strangest
- Strangeways
- strangle
- strangled
- strangled
- strangled cry
- strangled cry/gasp/voice etc
- strangled gasp
- strangled voice
- stranglehold
- strangleholds
- 掩泪
- 掩盖
- 掩眼法
- 掩笑
- 掩耳
- 掩耳盗铃
- 掩蔽
- 掩蔽部
- 掩藏
- 掩袭
- 掩覆
- 掩讳
- 掩过饰非
- 掩闭
- 掩隐
- 掩面
- 掩面失色
- 掩饰
- 掩鼻
- 掩鼻偷香
- 掩鼻而过
- 措
- 措举
- 措办
- 措勒