I think it is logical but it is too technical for general public. Couple times when I was presenting my work for non-scientific crowd, I used the word "precipitation" and later I realized that I should have used "rainfall" because it is not often used in general communication.

I agree with Sita Karki absolutely logical but technical.

Definitely not.

The word 'geo' is derived from the greek word 'ge' which means 'earth'. that is the 'planet earth'. Land is only a portion of earth. i do understand that at times the word earth is interchangeably used with soil, however for the scientific use, the word 'landslide' will be more suitable. on a lighter note, geoslide would mean that the planet is sliding away in the space.

the term geo is also used for a marine eroded landform and which has a very different meaning.

and if you want a unified word, 'mass wasting' is already present. to be more technical and scientific, landslide is one type of mass wasting and there are different other types of mass wasting that inckudes different types of slides, slumps and falls and also differentiated by materials like rock, land, mud, earth.

I reckon the term landslide is well established, practical and good enough.

If you want to be more correct on termination, you might want to go for gravitational mass movements - which is quite a mouthful.

I think "landslide" sounds good enough. Even though it is not always accurate (technically, a mudflow is not a "slide"), it works well. But then, you can use more precise definitions (see Hungr et al. 2014, for instance) to clarify what you are talking about.

Gravitational mass movements sounds good too, as Benni Thiebes mentioned.

I think is necessary to talk with the validated terminology, and as Gianvito says, is important to clarify the definitions and classification systems in use. For example, in some classification systems, the sliced material is mandatory to call the movement, others are based on movement characteristic as its dynamic. Some classification systems or proposes to adjustment are: (Cruden, 1991; Cruden & Varnes, 1996; García Yagüe, 1966; Hutchinson, 1988; Nemčok et al., 1972; Sharpe, 1938; Záruba & Mencl, 1982).

If you say LANDSLIDE to refer all kind of movements (rockfalls, landslides, flows, etc) is better to say mass movements or gravitational mass movements, because in several classification systems landslides are a subtype of movements and this cause confusion. Otherwise, Cruden and Varnes 1996 (one of the most citated studies in this area) and others, defined and used the term “LANDSLIDES” to refer the movement of a mass of rock, debris or earth down in a slope. I think this is the best term to call this process (because is supported by many authors) and scientifically used.

Here the mentioned documents:

Cruden, D. M. (1991). A simple definition of a landslide. Bulletin of the International Association of Engineering Geology, 43(1), 27–29. https://doi.org/10.1007/BF02590167

Cruden, David M, & Varnes, D. J. (1996). Landslides types and processes. In K. Turner & R. Schuster (Eds.), Landslides: investigation and mitigation (247th ed., Issue 1982, pp. 36–75). Transport Research Board Special Report.

García Yagüe, A. (1966). Contribución para la clasificación de los movimientos del terreno. Revista de Obras Públicas, 114(1), 995–1003.

Hutchinson, J. N. (1988). General Report: Morphological and geotechnical parameters of landslides in relation to geology and hydrogeology. In C. Bonnard (Ed.), Fifth International Symposium on Landslides (pp. 3–35).

Nemčok, A., Pašek, J., & Rybář, J. (1972). Classification of landslides and other mass movements. Rock Mechanics Felsmechanik Mécanique Des Roches, 4(2), 71–78. https://doi.org/10.1007/BF01239137

Sharpe, C. F. S. (1938). Landslides and related phenomena: A study of mass-movements of soil and rock. Columbia University Press.

Záruba, Q., & Mencl, V. (1982). Landslides and their control. In El Sevier (2nd ed.). Elsevier Scientific Publishing Company.

How about "mass movement"? There you have everything classified according to water saturation and speed ... from soil creep to rock fall.

(CARSON M. & KIRBY M. (1972). Hillslope form and process, Cambridge University Press)

Landslide is well established and understood by the international community as indicated by other responses in this thread. Other terms are in use such as debris slide, mud slide, earth slide etc. which provide sub-classification of mechanisms and materials. I'd recommend you read Dikau and Brunsden 1996 Landslide Recognition, Wiley, to add to the list of refs given above. I get the point but not convinced 'geoslide' adds much other than confusion of the established schema. Why fix something that works! Regards, Prof Roger