气愤 vs 生气 vs 发火儿（近义词）

1)气愤 is an adjective while 生气 and 发火儿 are verb-object phrases.All the three indicate indignation:气愤 and 生气 may not be showed sometimes,but 发火儿 is usually revealed,by quarrel or curse,for example.Besides,气愤 is more literary.Since the three words are of different parts of speech,their usages are also different.
2)In example①，气愤 can take 极了，至极 as its complement,but the other two phrases cannot be so used(生气 in colloquial speech may take a complement occasionally).气愤 and 生气 can take an adverbial and the two are interchangeable sometimes:
3)In example②，besides being more literary,气愤 is also fiercer than 生气.
4)发火儿 is the fiercest of the three.
5)Besides,生气 and 发火儿 can be inserted into different elements: