Fin
Vari
Eas
Part
Serv
1

A person who is in the last round of a contest.

finalist

1

of several different types

various

1

comfort, not having to try hard

ease
1

Fond of someone or something.

partial

1

To be worthy of.

deserve
2

At last, at the end

finally

2

a collection of different things, an assortment

variety

2

Not difficult at all, most simple

easiest

2

A small piece of something, a tiny bit, a speck.

particle

2

A restaurant worker that serves food.

server

3

Having and end, limited

finite

3

the result of varying, a change from the normal

variation

3

uncomfortable, not relaxed, worried

uneasy

3

Special, set apart from others in a group.

particular

3

Work done for others, helpful acts.

service

4

Incomplete, not finished

unfinished

4

likely to change or be different

variable

4

BONUS: a disorder of structure or function in a human, animal, or plant, especially one that has a known cause and a distinctive group of symptoms, signs, or anatomical changes. 

disease

4

To divide into parts

partition

4

Useful, helpful, able to be used for a long time.

serviceable

5

BONUS: limitless or endless

infinite

5

BONUS: a form or version of something that differs

variant

5

BONUS: relaxed and tolerant in approach or manner. 

easygoing

5

One who takes part in an activity with another person.

partner

5

BONUS: a harmful action

disservice