Alike and All together

Alike adverb - In like manner.

All together and alike are semantically related In some cases you can use "All together" instead the word "Alike" as an adjective or an adverb.

All together adverb - Used of a group whose members acted or were acted upon collectively and when `all' and `together' can be separated by other words.

Alike and all together are semantically related in methodical topic. Sometimes you can use "Alike" instead the phrase "All together" as an adjective or an adverb.