Firm
Staunch(Adj)
Firm
Resolute
Something that is fleeting or short lived
Ephemeral(Noun)
Brief
Momentary
To feel very angry or to boil
Seethe(verb)
Rage
Roil
A feeling of Tiredness, weakness and lack of interest in daily activities
Lassitude(Noun)
Lethargy
Tiredness
Things that are very different from each other
Disparate(adj)
Diverse
Distinct
In a way that contains no mistake
Immaculately
Perfectly
Impeccable
Very Serious, extreme or severe
Acute(adj)
Sharp
Keen
Severe
Intense
Someone who obtain pleasure from receiving punishment
Masochist(noun)
Sufferer
Self-torturer
To leave somebody or something
Abandon(verb)
Leave
Give up
To go bad or make something go bad
Rot(verb)
Decompose
Waste