- available: (adj.) ready to be used or taken
- particular: (adj.) specific or special, single or specific person, thing,group, class
- keen: (adj.) sharp and alert
- detecting: (verb) working to discover something
- mature: (adj., verb) to grow and develop over time
- vary: (verb) to change something
- resemble: (verb) to be or to look similar to something or someone
- unobserved: (verb) hidden or unnoticed
- ferocious: (adj.) very aggressive and scary
- contentment: (noun) the state of being in total happiness