What is the difference between Alkylation and Acylation?

Alkylation is the exchange of alkyl group starting with one molecule then onto the next. The alkyl group might be exchanged as alkyl carbocation, a carbanion, a free radical or a carbine.
Acylation is the procedure of accumulating an acyl group to compound. The compound giving the acyl group is known as the acylating agent.

Alkylation means the addition or substitution of an alkyl group (-R).

Acylation means the addition or substitution of an acyl group (-CO-H or -CO-R).