decease 同 death 用法上有咩唔同?

http://www.thefreedictionary.com/decease
the above link can help you,
but decease is more formal or polite term ...
http://www.answers.com/topic/decease
DECEASE can be a VERB or NOUN
but DEATH is a NOUN only.
When people want to avoid the word "Death", they will use decease ...
in news paper, in ceremony, in memorial ... people want to skip "DEATH"
and use "Passed away" or "Deceased" ...
hope it help....
DEATH=DECEASE (noun for both)

Death 是一個名詞 (noun), 意思可解作死, 死亡, 殺死和死神.
若加上 preposition " of " 就可解釋引致死亡的原因.
另外 death 可配合其他名詞組成複合名詞, 例如:
death-blow (致命的打擊), death-rate (死亡率)

Decease 可作為名詞 (noun), 意思可解作死亡, 通常用於法律用語.
亦可作為不及物動詞 (v.i.), 通常用作過去分詞, 如: the deceased "死者" "已故者".