undergo

As an adverb together

is at the same time, in the same place; in close association.

As an adjective together

is (colloquial) well organized, well developed.

As a verb undergo is

(obsolete) to go or move under or beneath.

As a verb undergo is

(obsolete) to go or move under or beneath.

In transitive terms the difference between undergo and sustain

is that undergo is to suffer or endure; bear with while sustain is to confirm, prove, or corroborate.

As verbs the difference between undergo and sustain

is that undergo is to go or move under or beneath while sustain is to maintain, or keep in existence.

As a noun sustain is

a mechanism which can be used to hold a note, as the right pedal on a piano.

In transitive terms the difference between expose and undergo

is that expose is to abandon, especially an unwanted baby in the wilderness while undergo is to suffer or endure; bear with.

As a noun exposé

is publication of investigative journalism.

As a verb undergo

is (obsolete) to go or move under or beneath.

As a noun mitose is

mitosis (division of a cell nucleus).

As verbs the difference between undergo and diazotize

is that undergo is to go or move under or beneath while diazotize is to undergo diazotization.

As a verb undergo

is (obsolete) to go or move under or beneath.

As a noun undergoer is

one that undergoes.

As a verb undergo

is (obsolete) to go or move under or beneath.

As a noun experiencer is

a person who experiences.