Something is grown if it has finished growing and reached its full size, or has been growing for some time. The dog in the picture is fully grown.
Growth is the process of growing, or something that has recently grown. For example, "look at all the new growth on the trees".
A grub is the immature form of many insects, particularly beetles. Grubs usually live in the ground or in fallen leaves, eating rotting vegetation. The grubs you commonly see in your backyard will grow up to be either beetles or moths. Grubs all look quite similar to each other but can look dramatically different to the adult insect they will turn into.
Scientific name: psidium guajava
A guide is someone who shows you where to go in a strange place. Many guide will also tell you information about the place as they are showing you through it.
Gis forGuillotine
A guillotine is a French device that can be used to kill people by cutting off their heads. The victim has their head held still at the base of the device, and the blade is hoisted up quite high and let fall.