15 Letter Words
dehydrogenation
24
postvaccination
24
codetermination
20
decontamination
20
postpollination
19
procrastination
19
recontamination
19
indetermination
18
insubordination
18
redetermination
18
superordination
18
interlamination
17
undetermination
18
14 Letter Words
exsanguination
22
dechlorination
20
discrimination
19
foreordination
18
predesignation
18
pretermination
18
conglutination
17
disinclination
17
incoordination
17
indoctrination
17
predestination
17
repristination
16
subalternation
16
transamination
16
ubiquitination
25
13 Letter Words
deoxygenation
25
extermination
22
reexamination
22
hydrogenation
21
compagination
20
revaccination
20
defibrination
19
demyelination
19
recombination
19
codeclination
18
cognomination
18
decarbonation
18
fractionation
18
hallucination
18
miscegenation
18
predomination
18
concatenation
17
contamination
17
impersonation
17
incrimination
17
peneplanation
17
prenomination
17
recrimination
17
determination
16
dissemination
16
12 Letter Words
rejuvenation
22
cachinnation
19
complanation
18
chlorination
17
condemnation
17
impregnation
17
propugnation
17
sulphonation
17
trephination
17
halogenation
16
invagination
16
consignation
15
contignation
15
coordination
15
delamination
15
denomination
15
deracination
15
emargination
15
fluorination
15
ingemination
15
repagination
15
illumination
14
incatenation
14
incoronation
14
insemination
14
11 Letter Words
hyphenation
22
oxygenation
22
expugnation
21
examination
20
excarnation
20
explanation
20
inquination
20
cybernation
18
machination
18
vaccination
18
bombination
17
combination
17
commination
17
fascination
16
fulmination
16
hibernation
16
impugnation
16
methanation
16
profanation
16
abomination
15
acumination
15
bromination
15
calcination
15
carbonation
15
crimination
15
10 Letter Words
divination
14
immanation
14
impanation
14
domination
13
gemination
13
pagination
13
catenation
12
coronation
12
eburnation
12
lamination
12
lumination
12
marination
12
nomination
12
patination
12
rumination
12
semination
12
supination
12
detonation
11
iodination
11
ordination
11
sagination
11
stagnation
11
alienation
10
intonation
10
resonation
10