RIPPED!! Wait that's 6 letters. Well, not that!!
suit
able
'Wrap' would fit.
Fade or melt would fit.
'Lazy' might fit, also 'foul', or 'icky'.
4 words that fit the pattern are jilt, jolt, jest, and just.
fit
A "tank" would fit.
fit, apt
Envy Is A 4-Letter Word
I don't believe that there are any proper English words that fit this criteria.
Either the word puma or the word lion would fit that description.
hale
Regal