different between excitement vs blowoff

English

excite +? -ment

excitement (countable and uncountable, plural excitements)

(uncountable) the state of being excited (emotionally aroused).
- E.A. Poe, The unparalleled adventure of one Hans Pfaal:
  By late accounts from Rotterdam, that city seems to be in a high state of philosophical excitement.
(countable) something that excites.

From the verb phrase blow off.

blowoff (plural blowoffs)

Something that is blown off.
The explosive separation of part of a rocket etc in order to prevent its destruction and allow for retrieval
A blowing off of steam, water, etc.
(colloquial) An outburst of temper or excitement.
(Britain, slang) A fart.

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