1 add to, amplify, augment, develop, enhance, expand, extend, fortify, heighten, improve, increase, intensify, reinforce, strengthen. 2 advertise, boost, plug (informal) promote, publicize, spotlight. sustain v. maintain ; bear ; stand ; support ; tolerate. bad blood n.

transitive verb. 1 : to keep in an existing state (as of repair, efficiency, or validity) : preserve from failure or decline maintain machinery. 2 : to sustain against opposition or danger : uphold and defend maintain a position. 3 : to continue or persevere in : carry on, keep up couldn’t maintain his composure.

Maintain is defined as to keep in a current state in order to prevent from failing or breaking or to carry on or to support or provide. An example of maintain is to bring one’s car to a mechanic for regular oil changes. An example of maintain is to keep soldiers on task. Maintain two cars.

As nouns the difference between maintenance and maintaining is that maintenance is actions performed to keep some machine or system functioning or in service while maintaining is the act of doing maintenance.

1. maintain (that)… The men maintained (that) they were out of the country when the crime was committed.
2. It is difficult to maintain that such a harsh punishment was justified.
3. maintain something She has always maintained her innocence.
4. + speech ‘But I’m innocent! ‘ she maintained.

Maintainance is a misspelling of the ideal word. This is as a result of following the regular pattern of adding a suffix to the root word “Maintain”. The root word gives rise to words like maintained (maintain + ed), maintainer (maintain + er), maintainability (maintain + ability), and maintainable (maintain + able).

The definition of maintenance is providing support or upkeep to something. An example of maintenance is a janitor keeping a school clean. Car maintenance.