Hand in glove and In unison

Hand in glove adverb - In or by combined action or effort.

In unison and hand in glove are semantically related In some cases you can use "In unison" instead an adverb phrase "Hand in glove".

In unison adverb - Speaking or singing at the same time; simultaneously.

Hand in glove and in unison are semantically related in together topic. Sometimes you can use "Hand in glove" instead an adverb phrase "In unison", if it concerns topics such as as a group, as one.